5  Star politician crossing city used for film-making, maybe (7)

 9  Spheres of atmospheric gases not including oxygen (5)

10 Dullard may almost disregard a detailed Clio, for example (9)

11 Sporting contest in restricted race of course (5,5)

12 Drive away from brief fire (4)

14 Base and difficult period in East End of London zone (8,4)

18 Indication or disposition to remove the fug (3-9)

21 Starters - ultra-green large Indian fruit (4)

22 Spooner's sharply pointed carbuncles in danger areas (5,5)

25 European keeps cats initially (and dogs) coming back from Charleston, for example (5,4)

26 Sounds as if she likes alcohol and acid (5)

27 Wanted! You are immature Scottish hooligan (7)

28 Metal smell emerging (7)

 1  See 19

 2  Folly of girl guarding an uprising (6)

 3  Abandoned river, ordeal is not abject misery (10)

 4  See 19

 5  Clean where letters are finally found in bus & minicab? (9)

 6  Wisdom, say, lacking an exemplar (4)

 7  A small room for tea primarily in relatively comfortable surroundings, perhaps (8)

 8  Easy thing to floor (8)

13 Profound dislike of brief, weird promises to Head (10)

15 Knobbly, certainly not bloated, I was replaced by you (9)

16 See 19

17 Liar sank junk in Asian state (3,5)

19/16/4/1            Luther, dizzy poet with pure stanza collection here (3,3,8,5,6)

20 Verve of Puck at last climbing to top (6)

23 Enter this way or that (3,2)

24 David, slim, may rest (4)