Across
1What the bookmaker offers, and what you are at when you disagree (4)
4Sound that comes back, and a letter to a signaller (4)
9Ice veer wildly, and take it in (7)
21Opportunities buried in which ancestors (7)
25A horse with Apple's system, where the films get made (7)
26As one and nine — utterly stupid (7)
27A man suit, wrecked by the great wave (7)
28Informer's opening, and a squalid place to live (7)
32Reunite awkwardly, in the womb (7)
33I, with the wise men out of the north-east, picture it (7)
34English leg, then an insect, and altogether very stylish (7)
35Topside, cooked, and put down as a payment (7)
39Rex and Meet, shaken up, go to the limit (7)
40Bare, then drunk, and bathed in silver (7)
Down
2An edict rewritten with energy, and it is a lie (6)
3Coders rearranged, and notched it up (6)
7Are, turned about: it's an age (3)
8Pretend to be a part of the play (3)
21Offhand about time and the unknown, and somebody gets hurt (8)
22Graduate in, er — the metal, spelled the American way (8)
23Where the doctor sees you, a learner too, and coldly detached (8)
24Mystics, energised and reorganised: it runs right through (8)
28Uterine, rebuilt round a duke, and together again (8)
29Between twelve and twenty: young, and yet old (8)
30Where it started, with a learner, and nobody did it before (8)
31The cricket side's turn, and the hour it comes at (8)
35Democrat's reams of paper, and the stuff of sleep (6)
36The way, plus a big operating system, and it is rather moving (6)
37Society's springs, and it grows (6)
38Time to lift things, and these are the crimes (6)
Through
2Medics tamper with the evidence (7)
3Doubt the very one you are questioning (7)
5Copper, one, and a curve out of the maths: that's the cooking (7)
6Old boy's view is a filthy one (7)
9Genuine doctrine, telling it as it is (7)
10Stylish, then a refusal, and Mexican-American (7)
11First, and what you sign with (7)
12In your own you are at home, and it is on the table (7)
13Sacred, rebuilt, and frightened (6)
14A circuit, then the best, and it sits on your knees (6)
15Since it is certain, promise it (6)
16A sweet street, and the sweetest of the lot (6)
17Different, and hidden in mother (5)
18Purchase, then hesitate, and here is the customer (5)
19Stout Capone, and it proves deadly (5)
20The pot in the card game, or the cat beside it (5)