I have a soft spot for puzzles such as this that have clues presented in alphabetical order of their answers. Goodness knows why, when I might end up staring at a blank grid! Perhaps its just that the ‘sort and slot’ technique appeals to the same desire for order as jigsaws.
At any rate, ‘Lucas’ could be a number of things. Isn’t George still flogging the dead horse of Star Wars? Maybe it’s related to that.
It’s not. No Skywalkers or Death Stars to be seen. A pity, perhaps, but I seem to be making fast progress with the puzzle, so that quickly goes out of my mind.
I experience what seems to me a lucky guess at what goes where in the grid, but might very well be evidence of clever construction.
Whichever it is, the more difficult entries and unheard-of words cause just enough friction to keep things interesting.
I’m not expecting part of the theme to involve a whole entry, so it takes me right to the end to finalise the puzzle. The rest of the theme appears along the tried-and-true NW-SE diagonal.
The completed grid looks like this:
| S | P | O | U | S | E | A | M | E | T | R | O | S |
| O | L | F | A | C | T | G | A | M | I | E | S | T |
| V | A | F | E | O | U | R | S | P | A | G | P | E |
| I | N | P | I | G | C | E | L | A | N | U | R | E |
| E | X | U | R | B | R | E | H | E | E | L | E | D |
| T | T | T | E | R | O | D | A | S | S | A | Y | S |
| C | Y | A | N | E | R | N | S | T | C | E | P | S |
| F | I | N | I | T | E | S | A | I | R | O | Y | S |
| R | O | N | C | A | D | O | R | C | O | X | A | E |
| E | M | U | A | S | I | A | S | O | C | H | E | R |
| I | O | L | P | C | P | R | O | G | S | I | M | I |
| S | T | A | S | H | I | E | B | E | E | D | I | E |
| T | H | R | E | E | P | D | A | E | N | E | A | S |
As illustrated, the theme is FIBONACCI SERIES. This explains the title of the puzzle, as François Édouard Anatole Lucas was a mathematician who took great interest in Fibonacci numbers. You can read more about him here.
The one part that did slow me down is the NW corner, and that *is* evidence of clever construction. The unclued entries – many of which are in the NW corner – are:
1ac and down SPOUSE and SOVIET
2 PLANXTY
3 OFFPUT
5 ETUC
8 EMPAESTIC
13 OLFACT
21 BRETASCHE
34 SERIES
1, 2, 3, 5, 8, 13, 21, 34… That’s the Fibonacci Series. Very nice.
Notation
(xxx) = definition
[xxx] = (anagram/homophone/container/etc.) indicator
XXX* = anagram
< = reversal
Please post a comment if the explanations are not clear.
| AENEAS | NÉ (Born) AS (when) [following] AE (aged) traveller (6) |
| AGREED | A GREED (keen desire) is OK (6) |
| ANNULAR | Fourth digit from the left: ANNUL (cancel) A (one) on R (right) (7) |
| APSE | Niche for APPS (programs) [on phones] (4) |
| ASAR | Ridges in A SAR (fish) (4) |
| ASIA | Continent A S (second) [before] I A [start on ALCOHOL] (4) |
| ASSAYS | Tests ASSES (coins) AY (indeed) [for] E (Spain) (6) |
| BEEDIE | Cheap fag makes BEE (insect) DIE (perish) (6) |
| CEPS | These mushrooms are [regularly] ChEaPeSt (4) |
| COXAE | COX (Helmsman) needs AE (ligature) for more than one hip (5) |
| CYAN | FanCY A Nest [hiding] teal perhaps (4) |
| EIRENIC | Pacific EIRE (country once) [not quite] NICE (friendly) (7) |
| ELAN | Style of E (eastern) LAN (network) (4) |
| EMU | Unit of measurement for large bird (3) |
| ERNST | Painter in STERN* [getting knotted] (5) |
| ESCROCS | French swindlers ES (in Paris are singular) CROCS (reptiles) (7) |
| EXURB | Beyond Greater London, say, <[echoing] [part of] BRUXElles (5) |
| FINITE | PINITE (Hydrous silicate) [not] P (soft) [but] F (fine), subject to conditions (6) |
| GAMIEST | International in a bit of fun on street is most sensational (7) |
| IN PIG | Pregnant IN (because of) PIG (Ian’s hot water bottle) (5, two words) |
| IO MOTH | Its larvae can give a painful sting in IOM (tax haven) that’s [possibly] HOT* (6, two words) |
| METROS | [With a change of head] RETROS (some rockets) [could become] underground systems (6) |
| OCHER | OR (Gold) [without] CHE (red) is colour for Americans (5) |
| OGEE | Cyma AP (apparently) [not on] APOGEE (highest point) (4) |
| OSPREY | OS (Large) PREY (lunch perhaps) for bird (6) |
| OURS | Bear in France is belonging to us (4) |
| OXHIDE | OXIDE (Compound) [used around] H (hard) skin (6) |
| PROG | University officer PRO (in favour of) G (Gauss) (4) |
| PYAEMIA | {A PIE MAY}* [perhaps] cause poisoning (7) |
| REGULAE | [Start of RUGBY] LEAGUE*[‘s changed] rules (7) |
| REHEELED | Recovered HE (cardinal) REELED (danced) [around] (6) |
| REIST | Sudden fit of stubbornness in Perth from I (one) [among] REST (others) (5) |
| RONCADOR | R (Take) ON CAD (ungentlemanly person’s) OR (gold) fish (8) |
| RORE | Will created this tumult being READ OUT [at first] [accompanied by] RE (note) (4) |
| SCOG | Shelter in Scotland from S (Southern) COG (deception) (4) |
| SOARED | Rose [sounds like] SWORD (one that’s sharp) (6) |
| SOBA | SO (Likewise) B (black) A (are) noodles (4) |
| STASHIE | STASH (Secret hoard) IE (that is) a disturbance for Scots (7) |
| STEED | For Shakespeare the function of another horse (5) |
| THREEP | Traditional belief in the North is THREE P (of little worth) (6) |
| TIAN | Mixed gratin not Greek (4) |
| URE | Old wild ox in river (3) |
As you say, Mr Sting, a nice puzzle. I was worried that there would be no single method of filling the unclued entries with real words; I shouldn’t have doubted the setter!