THE BIG CROSSWORD

Across

1 Malign

4 Fairly good (3,3)

8 Type of golf event (3-2)

12 Indifference

14 Farm worker

15 Account keeper

17 A clear quartz

18 Be ready (3,3)

19 Scorching

23 Frustrate

25 Nom de plume

28 Pig noise

29 Game tile marked with pips

30 Dimly

32 Deadly

34 Dirty spots

35 Sovereign

38 Italian appetiser plate

40 Complex protein

41 Twist

44 Mourn

46 Biblical patriarch

48 Swallows

51 Zany

52 Classless

53 Industrial city in NW Germany

54 Built-in

55 Against

Down

1 Loyalty

2 Piscine

3 Financial

5 Oil exporting group

6 Cut with the teeth

7 Sundown

8 Fraud

9 Fairytale monsters

10 March on the spot (4,4)

11 Marine mammals

13 Affront

16 Manages

20 Revelation

21 Thereby (Lat) (4,5)

22 Castrated horse

24 Succeeds by striving (4,3)

26 Invalidate

27 Snail, eg

31 Pacts

33 Backyard cricket (3-3-3)

36 Imperfect

37 Become greater

39 West African republic

42 Bell sound

43 Cabs

45 Labyrinths

47 Inheritors

48 Hard of hearing

49 Yarn across the warp

50 Sound in mind