Complete
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1 9 11 16 18 22 24 13 2 14 3 19 8 12 23 4 25 5 10 15 20 6 21 7 17
  1. 1a Self-important (6)
  2. 4a Signal to remain indoors (6)
  3. 9a Moist (7)
  4. 10a Mouth painter? (5)
  5. 11a Bees together in flight (5)
  6. 12a Resin-flavoured wine (7)
  7. 13a Inca Trail destination (5,6)
  8. 18a Glass lab vessel covering gas etc (4,3)
  9. 20a Of the far north or south (5)
  10. 22a Intestinal bacteria (1,4)
  11. 23a Cephalopod (7)
  12. 24a I tried (anag.) (6)
  13. 25a Jacket – fire (6)
  14. 1d Rash (6)
  15. 2d Bread type (5)
  16. 3d Success (7)
  17. 5d Dark (5)
  18. 6d Dapper (7)
  19. 7d Lie in wait for and ambush (6)
  20. 8d He, she or it, say (5,6)
  21. 14d Collectively (3,4)
  22. 15d Legislative building (7)
  23. 16d Miserable (6)
  24. 17d Remover of writing (6)
  25. 19d Sap (5)
  26. 21d Bolivian capital (2,3)