6  He's sponsored police officer to probe thug (6)

 9  Dons meet here to copy and fiddle (6)

10 Tools producing half of suture lines? (8)

11 Good girl about to swallow lie that's material (5,5)

12 Boy with poor A-level grades gets to university at last (4)

13 African branch development is last item on agenda splitting airline board's leadership (6)

15 Metal money apparently good? I'm not sure (8)

18 Places to cultivate award-winning tournament players (8)

20 Incentive to change vehicle? (6)

21 One prejudiced to some extent knows no better (4)

23 An emphasis on cooking vessel skills? (10)

25 Woman playing topless, like a tease (8)

26 Bulb lit up grail before start of Christmas (6)

27 Sophy's recycling makes a mint (6)

28 What might be tabled in European Parliament by assembled Greens? (8)

 2  It's clear former Head entertains baseless religion (9)

 3  Men sacrificing pawn for nothing creates confusion (5)

 4  Unutterable, or incapable of being sworn? (9)

 5  Uniform just has no appeal (7)

 6  Diver capsized shipping hazard leaving Channel Islands (5)

 7  Paint in hellish mood (9)

 8  I'll shortly be entered in dictionary as "drunk" (5)

14 Fan props up person beginning to suffer setbacks (4,5)

16 Spooner's dispute with busy figure on plane (9)

17 Dutch killer, 50, escaping from Egyptian city that is without police force (9)

19 Bridge and Elgar retrospective lacking A&R glitter (7)

22 Woman knowing best takes setter for a fool (5)

23 One running mile has power to spare (5)

24 Every now and again, superego checks over youngster (5)