5  Long and weary work outside (7) (7)

 9  Ruin the planet? Almost! (3) (3)

10  Like a palimpsest packed with purple prose? (11) (11)

11 Rags tattered, perhaps sewn without initial hemming (10) (10)

12 Man in South Africa went back for weapons (4) (4)

14 Silly thing arbiters can't reform (12) (12)

18 Painting, to me, involved natural colour (12) (12)

21 You could swear one loathes not taking sides! (4) (4)

22 Tweaked to scan only two notes (10) (10)

25 Dissipated men repeat it incoherently (11) (11)

26 U-boat, for instance, brought back as transport... (3) (3)

27 ...right after airmen scrapped with sailor (7) (7)

28 Seed produced from one's by a mutation (7) (7)

 1  Doctor Doom in a mask (6) (6)

 2  Wily little creature finally lured... (6) (6)

 3  ...with precooked mince - it mostly eats grubs (10) (10)

 4  They follow quietly, and keep heading out (5) (5)

 5  Gaudiest Twilight actor was initially dullest (9) (9)

 6  Leading data scientists hosting artificial intelligence platform (4) (4)

 7  Tree holding but blown about in sudden eruption (8) (8)

 8  One bit changed in prison ballad (8) (8)

13 Best you all reacted positively (10) (10)

15 Pot, other earthenware kept astern (2,3,4) (9)

16 Saying I'm sharp, curiously, admits nothing (8) (8)

17 Revolutionary page with oath torn in the middle (8) (8)

19 Cop, felon going steady! (6) (6)

20 No team backing up inventor (6) (6)

23 Hands out cards for discounts (5) (5)

24 "Topless girls!" sign (4) (4)