4  Herb (Republican) interrupts important American military leader (8)

10 Colour reflected by dog soup (7)

11 Captain disembarks from boat with American letter game (7)

12 King and knight put back in jeopardy (4)

13 Visual signal transmitter's reception very poor (5,5)

15 Tin garden tools show no resistance to deceivers (6)

16 Runs large 15s (7)

20 Very boring breaks outside (7)

21 Second exercise involving old policemen turned out well (6)

24 Put money on having good morning at one-day game (10)

26 Diamonds and more diamonds used in 1a, 3, 9, 11, 12, 15 & 16, 24, 25 & 31 and 30 (4)

28 One who failed to finish the course has sulky expression after doctor gets round (7)

29 Country-lover to hit back at social unrest (7)

30 Second ban on old-fashioned college gives sole control (8)

31 Newsman shown a country losing its way, invaded by Switzerland (6)

 1  Spooner's preference in torture devices which could be part of comfy chair (8)

 2  It's reasonably healthy to be utterly furious about lost dosh (4,5)

 3  Slut stripped before party game (4)

 5  The last of the family's capital blown on rum (8)

 6  Actor regularly whining in ecstasy as editor turns over pages (6,4)

 7  Essentially crazy men get shaving equipment (5)

 8  Humbler setter one making the most of very little (6)

 9  Noxious gas blocked by the blame game (5)

14 Perhaps News Corp journalist gets note about heartless violence being on the increase (5,5)

17 Fairly normal ending as big defeat wipes force out (9)

18 Surprised Aunt Meg with Leonardo's first bronze (8)

19 Army unit has rabbit carrying a rifle (8)

22 One to offer space there as well (6)

23 Imprisons supermarkets (5)

25 Bird on new coin (5)

27 Knock-out model appearing in paper (4)