Complete
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1 9 11 14 21 22 24 17 2 15 8 18 3 4 12 23 5 10 16 19 25 6 20 7 13
  1. 1 a True concept (which can be sad or plain) (4)
  2. 3 a Without a hitch (8)
  3. 9 a Send up (7)
  4. 10 a Vertical pipe inside a building (5)
  5. 11 a Work by Bridget Riley, for instance (2,3)
  6. 12 a Joining into a single entity (6)
  7. 14 a Sell short? (13)
  8. 17 a Blend of Indian spices (6)
  9. 19 a Heraldic black (5)
  10. 22 a Impromptu (2,3)
  11. 23 a Enjoy excessively (7)
  12. 24 a Core principle — to Keynes (anag) (8)
  13. 25 a Bank (on) (4)
  14. 1 d Sequel (6-2)
  15. 2 d It breaks up a sentence (5)
  16. 4 d Expression (13)
  17. 5 d Cruel and wicked persons (5)
  18. 6 d Cry of devotion (7)
  19. 7 d Long ago (4)
  20. 8 d Straw hat with a flat crown (6)
  21. 13 d Necropolis (8)
  22. 15 d Cadaverous (7)
  23. 16 d Job, story or track? (6)
  24. 18 d Where The Gold Cup is run annually in June (5)
  25. 20 d Swell outwards (5)
  26. 21 d Barrel for holding liquid (4)

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