The first line of a 4 (two words) consists of 7A and the puzzle’s 3 41; the second line is 7D 12 33 37 (six words in total). Cryptic indications in seven clues are incomplete; in each case, the answer is formed when the indicated part has 12 33.
 

Across

1    Fret about fixing toy (11, two words)
11    Rook in spot with energy in attacking position (6)
13    Change in Romeo – product of bonding action? (7)
15    Rodents, when after cover, retreating (5)
16    Wise to follow uniform practice (5)
17    Improvement in part for all to see in vessel (6)
18    Leader of England in cricket? He was (5)
20    Rib revolutionary about breaking rule (6)
21    Chilli pepper used in Mexican chowder (5)
22    Skeletal structure in some disorder (7)
27    Transfer stopped by bank disregarding a language (7)
29    Fabric expert’s latest choice (5)
30    Cop has broken seals (6)
32    Hard governor, not an Armenian (5)
34    Run away without date (6)
36    Pause in front of monument in capital (5)
38    Moved home, summoned (7)
39    They leave without playing tune (6)
40    Knife held back (3)
 

Down

1    Climbing peaks without medium drugs (10)
2    Jesuit ordered a painting? No pressure (8)
5    Hesitation after tense start (7)
6    Pacifist awfully nice during summit (8)
8    Stop wanting constant comfort (4)
9    Stratagem concerning ticket (6)
10    Pull up after second obstacle on ski slope (5)
14    Doctor brings matron, highly energetic (12)
19    Crone fashioned new straw figure (10, hyphened)
21    Tuberous plant from Arkansas worthless with tea (9)
23    Thankful, having raised cover in thatching (8)
24    Lovers, longer in loft, caught out (8)
25    Criminal we hail for some time (6)
26    Insects spring up around hydrant (7)
28    Observed confusion in scattering of seed (6)
31    Refined man succeeded baron (5)
35    Map showing delta south of estate? (4)
 
A first prize of £30 for the first correct solution opened on 26 February. 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 2345, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.