4  Agency finds chemical in unfinished cake (6)

10 Ancient vault - one found in a college (7)

11 Fruit is a necessity when travelling to the West (7)

12 Be miffed when Kay goes for posh sarong (4)

13 So we and our dog slaughtered a capercaillie (10)

15 Russian playwright gives up heroin for make of vodka (6)

16 Sweet talk former envoy to leave Italy with marshal (7)

20 Play back pleasing noises about sex for supporter (7)

21 Purser losing his head becomes more pale (6)

24 Prepare to clean up a melon (10)

26 Annoy 1000 before church (4)

28/9 Excitedly cycle to harem - that's kosher! (3,4,5)

29 Wine levy on port (mature) (7)

30 Case of fruit - four included (6)

31 High balls for sportswomen (6)

 1  Deal with paper omitted from transport bill (8)

 2  Think about prayer (9)

 3  Celebrity discovered in Costa Rica (4)

 5  Relieve the burden on land used for ploughing (8)

 6  Record award received for business (10)

 7  Uniforms worn by charioteer getting freedom in Africa (5)

 8  Man on railroad finds a small 26a (6)

 9  See 28 Across

14 Turn on mate playing in competition (10)

17 Ice cream eaten by bird - quite the reverse (9)

18 Victor and Guy stand up for old countryman (8)

19 Kings and queen welcomed by very French fans (8)

22 Loner leaving society behind becomes vinegary (6)

23 Doctor Benjamin has small skin lesion (5)

25 Very much love as I may see it! (2,3)

27 Fairbank's regularly wanting a drink (4)