Cryptic crossword - The Scotsman 26/05/15

ACROSS

1 Provides plan to refute (8)

5 Boys from South Africa like raw dishes (6)

9 Start of parachute jump that’s available in autumn (4,4)

10 Agree to defeat auditor with change of emphasis (6)

12 Inkblot touted as revealing when under the table (6)

13 Cad can triumph in the Home Counties (5)

16 Half-embraced when encountered destiny (6)

17 Central part of castle is all that remains after highway regulation (4,4)

20 Alter the original state of false teeth when consuming apple (8)

21 Humble on one’s own property, it’s said (6)

23 Was very angry, lost head, got drunk (5)

25 Man who’s engaged in café abroad (6)

28 Dog in the manger re planning got initial lever in adroitly (6)

29 Altitude surprisingly resulted in freedom (8)

30 He wanted a heart to be prime characteristic of Homo sapiens (6)

31 Estrange bewildered NCO (8)

DOWN

1 Tip deemed initially unsavoury (4)

2 Give the girl a letter about butter (4)

3 Brilliant concerning man who’s had almost too much (9)

4 Farewell and thanks for the dance (6)

6 A sole arrangement can be bitter (5)

7 Greek mathematician who gave shape of parabola to one of the ancient Iranians (10)

8 Green rock found in London lake (10)

11 Cut down doctor admitted to be in debt (5)

14 Unlike me, you’re an adult – honestly! (1,3,3,3)

15 Al’s meaning to alter present, but not future, state of 25 (1,6,3)

18 Giving a sermon before getting sore (9)

19 Boat that’s behind on credit (5)

22 Despoil Bible in fury (6)

24 Dealt a blow by letter from Greece (5)

26 and 27 Casual acquaintance comes across a nuisance on both sides of the city (4)