Complete
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1 8 10 13 17 21 24 2 18 3 12 11 4 16 22 14 5 9 20 19 6 15 7 23
  1. 1a <span>Greenhouse gas, CO</span><sub>2 </sub> (6,7)
  2. 8a Orinoco, Tobermory, Great Uncle Bulgaria et al (7)
  3. 9a Be jubilant (5)
  4. 10a Continue (2,2)
  5. 11a Animal that preys on others (8)
  6. 13a Tattooist's tool (6)
  7. 14a City where Beethoven, Haydn, Mozart and Schubert all worked (6)
  8. 17a Was of greater significance than (8)
  9. 19a Jaunt — doctoring of information (4)
  10. 21a Healthcare worker (5)
  11. 22a Connoisseur of fine food (7)
  12. 24a Box containing items of value (8,5)
  13. 1d Intimidate (3)
  14. 2d Fictional barrister created by John Mortimer (7)
  15. 3d Barn-dwelling birds (4)
  16. 4d Barren area (6)
  17. 5d Exaggerate (6,2)
  18. 6d Arctic peoples (5)
  19. 7d What artistes aim to do (9)
  20. 10d Kind of biscuit — eg turning (anag) (6,3)
  21. 12d Indoor footwear (8)
  22. 15d Roman god, counterpart of the Greeks' Poseidon (7)
  23. 16d Covering that disguises someone's true nature (6)
  24. 18d Bulky (5)
  25. 20d One component of brass (4)
  26. 23d Take food (3)