1A (hyphened) suggests a word which, with changes to its 7D 33, becomes the four other words (including a name) suggested by the remaining unclued lights (including a pair). The word will appear in the completed grid and must be shaded.
 

Across

7    Outburst of song from tailor (3)
11    Lid of fryer accepted by mummy (6)
13    Hooters spoiling film again (7)
15    Central Zanzibaris run out and kiss in Scottish district (5)
16    George papers hypothetical surface (5)
17    Pip causing endless messes (6)
18    Lass returning for important date (5)
20    Pump supplying priest and townie (6)
21    British monarch embedding one shrub (5)
29    Girl in rage biting nurse (5)
30    What misanthrope has prickly pears? (6)
32    Valjean’s hound abandoned by Jack Parry (5)
34    Regular couple of chaps (6)
36    Yellow parrot crosses broken country (5)
37    More untrained troops fighting back (5)
38    College journalist rang (7)
39    Highest point of moulding on retired fort (6)
40    Decrepit friar avoids trouble (3)
 

Down

1    Raging valet in Ripon burst blood vessel (10, two words)
2    Ensign continued having island to protect (8)
3    Trendy old copper recently into graft (9)
4    Wavy sheen on standard works of art (12)
5    Dog indeed chewed plant (7)
6    Did rabbit, turning reddish brown, breed liberally? (8)
8    Words of book bound by Rechabite (4)
9    Foot soldiers numberless Citroën transported (6)
12    Georgia kicked about like Titus? (6)
14    Gent toying with episodic darlings (12, hyphened)
19    Modern compère dies (10, hyphened)
21    Bastard involved mad Miles in crazy stuff (9)
23    Unusually nice and true pale grey (8)
24    Cap to wear with fleece (8)
25    Chef’s first recipe needs one big tub for stock (6)
26    Parasites displaying amazon-stone muddled man’s lost (7)
28    Tramp nearly married drunk (6)
35    Tramp — a type of boat (4)
 
A first prize of £30 for the first correct solution opened on 22 July. 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 2415, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.