Cryptic crossword - The Scotsman 15/12/14

ACROSS

7 Sort out pigeonhole for class, at some stage (5)

8 Lost interest, in a way, so changed direction (6,3)

10 Was he magnanimous when he took turn with staff? (6)

11 Needed to get over, right round at first, when plastered (8)

12 At liberty to authorise some accreditation (8)

13 The last word in the New (or Old) Testament (4)

15 Get a few to follow; it’s pretty enjoyable ... (7)

17 ... and a few more may cut off a leading light (7)

20 Leaders accept cash in deal to get some LSD (4)

22 Is tightlipped about one rent, etc (8)

25 Begins rapid expansion to get off the ground, with safety first (5,3)

26 Former pupil had little time to exploit, to be blunt (6)

27 Would somebody book in a hurry? (9)

28 It’s senseless for subordinate to be low (5)#

DOWN

1 For a ram to cut it out could be quite disturbing (9)

2 Suggests down-payments are needed for overtures (8)

3 Was in the wrong class, but could still have a higher status (7)

4 Flood may overwhelm them after deluge (8)

5 Take a day to get to this place, to be true (6)

6 Is it more absurd to take a day off later on? (5)

9 Until now, one tracked a legendary Himalayan creature (4)

14 Melted away, with little resistance, having covered up (9)

16 Played with dice more, on average (8)

18 Going out with a top celebrity must be thrilling (8)

19 Is in favour of suitable stake, initially, in return (7)

21 Quick-witted chap started with some purchase (6)

23 Instrument needed to get some stolen goods back (4)

24 Left a port when full to the brim (5)