Cryptic crossword - The Scotsman 02/05/14

ACROSS

1 Signs of a certain number having been in states of stupor (7)

5 Induce additional passage with surgical instrument (7)

9 Waiting to get fuel service, perhaps, hearing it’s prompt (7)

10 Stood up again when almost rigid with the rough intrusion (7)

11 Dispute the claims of one hoping to find the elixir of life (9)

12 Making ground at the back is hard work (5)

13 Makes an unpleasant face when reviewing film on first settlers (5)

15 Clypes who spin yarns (9)

16 Sets off a bomb at meetings about school (9)

18 Authority lets prisoner enter boundaries (5)

21 Craig rolls something to smoke (5)

22 Taking live-and-let-live attitude on level terrain (9)

24 More suitable promotion for one making alternative version (7)

26 Flier’s on the way to crash into a hill (7)

27 It forms a mouth for a kind of English (7)

28 People with verbal OCD are a bother and pest (7)

DOWN

1 Transmitter-receiver needs help to work (7)

2 Thing that makes it clear (7)

3 Secret store of money reported (5)

4 Get involved in the argument, then say if Potter is at fault (4,4,3,4)

5 A-list character gives promise of fast delivery (5,5,5)

6 Man briefly gives car identification (3)

7 Draw down leading edge of razor in gut (7)

8 Observes case admitted and gives anaesthetic (7)

12 Turnout to rise (5)

14 Spaniard found face down in gutters (5)

16 Could be nothing to this at Customs, so easily cleared (7)

17 Glasgow tec discovers second case of horse in pie (7)

19 Composed, operated TNT with wire (7)

20 Looks at way of signing off (7)

23 Company of tradesmen who make gold, we’re told (5)

25 Start the sub-aqua finals with a cup of this? (3)