The unclued lights (three of two words) are of a kind.
 

Across

1    Slices top of sausage in front of dogs (5)
6    Starting at Keele, say, in flames? (7, two words)
11    Former England captain has Alec Robins out (10, two words)
15    Heartless Valentine’s streamer (4)
17    Wild chatter has teeth on edge (7)
18    Drink Church of Scotland finally banned (3)
21    Matches for Spurs and the Hammers say (5)
24    Peterborough’s backed some network (4)
27    Spanish province drops green knitwear (4)
28    A hospital covered by me, just for now (5, two words)
33    City replay regularly (3)
35    Potentially profitable project is yours for ten, as is said (7)
37    Chops for Welshman, reportedly (4)
39   Anonymous entertainer worried being on half pay (10, two words)
40    Actress’s final performance never finishes (7)
41    Tory leader involved in payments for honours (5)
 

Down

1    Two seats, pale brown, moved for Rattigan plays (14, two words)
2    Dog Latin, as a translation (8)
3    Ella goes, breaking collarbone on rough ride (6)
4    Repelled crowd, being absent (9, two words)
5    Country retreat at last, I wager (5)
7    Ancient Brits held in police nick (5)
8    Junior employee’s waffle (5)
9    Parts, espec. Iran, get them floored (14, two words)
12    Definitely on – French 33 (6)
14    Native American seen in state’s border (6)
20    People who could be relatively helpful (9)
22    Cosmetic rapprochement (6, hyphened)
23    Filming complete showing popular jail (8, three words)
26    Dish — English sweetheart in spin (6)
29    Port with poetry, say? Not unknown (6)
31    Musical monarch. No problem (6)
32    Money from marketplace (5)
34    Leans over tables (5)
35    Damage ground, parking in it (5)
 
A first prize of £30 for the first correct solution opened on 17 September. 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 2374, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.