10 United Nations prosecuted and ruined (5)

11 Book heartfelt songs (4,5)

12 Coarse breathing from a pair of Greek characters inhaling nitrogen (7)

13 Erode each dictator holding point (3,4)

14 A rhus or total bill (5)

16 Note pulses with average flow (much more than average flow) (5,4)

19 Book 9 or 21 for example (3,2,4)

20 Ape short fruit (5)

22 Advertising lines from film's runner in ship (7)

25 State "Henry Jones' dog" (7)

27 CIA scouts about for sound quality (9)

28 Mary-Jane enthrals University College heads with clear speech (5)

29 Peers' plant's book (5,3,6)

 2  Helper-out for Bond villain on isle (3-3,3)

 3  Hindi caste embraces language group (5)

 4  Chat to healthier engineer (3,6)

 5  Become used to things in lesser university uprising (5)

 6  Tamil tool used to create fruit (9)

 7  To err again with, say, raw opium (5)

 8  Copper's lifting up flower, sweet stuff! (7)

 9/21        Book response to "quis custodiet ipsos custodes?" (6,6)

15 Manifestation of Christ as a purgation (9)

17 Very high flier in dreadful way to lose a wicket (9)

18 Clan have a problem with sudden onset of snow (9)

19 Wrongly name scam I'll set to rights (7)

21 See 9

23 No sullen smell (5)

24 Capital of Valais shelters catholic heir (5)

26 Dished out grief to daughter (5)