2564: Sea monster

Five unclued lights are descriptions of another (four words), from another, by another (two words). Elsewhere, ignore one accent.

Across

10 Player and wrestler oddly changing places (4)

12 May take home case of oriental hemp product (10)

14 Regularly fooled veteran (3)

15 Prince’s press officer holding drink (8)

17 Mounts horse with complaints (5)

18 Quite lost, female runs in synthetic fabric (7)

19 State probes spies in high places (6)

22 Violent wind dislodging section of valve (6)

24 Two cobblers turned back in gateway (5)

27 Suppresses strong inclinations (9)

29 Astronomer Ryle going topless behind house (5)

31 Mowed a wild tract of grassland (6)

34 Timeless secrets swapped in corner (6)

39 Associate with horsey female, knocking back too much liqueur (8)

40 Varsity is fun, if short of females (3)

41 Impatient bookworms ultimately irritate librarian, they fear (3-7)

42 Frolic heartlessly in prison (4)

43 One after another, charge nurses quieten invalid (12)

Down

2 One embarrassing stench beginning to irk poor tailor (10)

3 Mostly lie about with fat idler (7)

4 Cook possesses extremely attractive old hob (5)

5 Belgian painter by Hermitage entrance (9)

6 Setter flees eruption of fearsome volcanic islands (6)

7 Man perhaps following a passageway (5)

9 At first skier wasn’t gainly, slipping on slope (12)

16 Drunk in Thurso tavern (3)

19 Lug around Senior Service and Ecstasy – it’s lucrative (6)

20 Poles race for money (6)

21 Support for key performer? (5,5)

23 Scoffed excessively at one, ever rude (9)

25 African territory once ungovernable, so I heard (8)

28 Spice Girl sang head off with alto (7)

30 Network broadcasting barbecues (not BBC) (6)

32 Strange, dowdy female shedding clothes (3)

33 Gawp at son, up and about (5)

37 Artist, initially nervous, turned sound off (4)

A first prize of £30 for the first correct solution opened on 1 August.