Each unclued light is somehow related to a clued one. Elsewhere, ignore an acute accent.
 

Across

 
4    Clone 33 recreating the Crocodile (11, two words)
11    Athlete taking Scottish miser to freemason’s son (9, two words)
13    Danger cut — touching heartless pedestrian (11)
14    Kiss nag (4)
15    Sound of pleasure having rock and heroin (3)
19    Distant mountains with stone (7)
22    Upshot of what is in salt, in France (6)
23    Restrained. Yes! Outside (6)
27    Helmsman left out doorkeeper (5)
29    Decided problem with Edgar swallowing drug (6)
31    Rough-neck on outskirts of Galway (6)
34    Stay in café to etch (7, two words)
38    Live in the Far East (3)
39    Letters from Westmarsh regularly (4)
40    Our Ferdinand the Elder turned about for extremist party member (11)
41    Ruby going astray (5)
42    Single operation for vital oarsman (9)
43    Bloodhound at seaside, wandering, with viral illness (11, two words)

Down

 
1    Rascals call Thalia and Co. (11)
2    Rode a sort of boat? (5)
5    Write poetry of member — one’s in Early English (7)
6    The Guernsey lily from Ireland in the north east (6)
7    This enzyme with calorie would be special (6)
8    Entertainment officer chopped tree in vehicle (7)
9    Flower’s scent, reportedly (4)
10    Got going and so fired a gun (9)
15    Active US soldier in old festival (5)
17    Stylish, having celebrated in Derbyshire? (11, hyphened)
20    Dull plant mentioned by Spenser first in four dramas (9)
21    Worker in the plantation (3)
25    One estimate for cross (5)
28    Notice in position, tops missing, set on fire (7)
32    Vehicles take away birds (6)
33    Mother’s name! (6)
36    Leading chemist has round containers (5)
37    Before 21.250 (4)
 
A first prize of £30 for the first correct solution opened on 1 December. There are two runners-up prizes of £20. (UK solvers can choose to receive the latest edition of the Chambers Dictionary instead of cash — ring the word ‘Dictionary’.) Entries to: Crossword 2188, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.