Cryptic with Theme #4

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Across
  1. 1. Partial cataclysm augured by dragon (5)
  2. 3. Spooner's tawdry group is second-in-command (5,4)
  3. 5. I call it the cause of many problems (3,4)
  4. 8. Reportedly a solution for quicker evacuation from land of evil? (6)
  5. 11. Cycle hires in north west of the continent (5)
  6. 13. One of 21 carries small men (9)
  7. 14. Monster Party setback before scoundrel cut in half (6)
  8. 17. Village insiders left the hob on when interrupted by adulterer (8)
  9. 19. Her, throw a spider? (6)
  10. 20. Merciful programming language has the king's ear (10)
  11. 22. Son of bowman said to be cause of annoyance (4)
  12. 23. Tired old man chiefly lives alone in the forest (3)
  13. 24. Bee's defence is a dagger (5)
Down
  1. 1. Heir in disguise is a confident walker (7)
  2. 2. Divine spirit and flag given makeover (7)
  3. 4. Perhaps Welsh icon is feeling ill from the pub? (5,6)
  4. 6. Legal raid botched by royal who gives gifts (9)
  5. 7. Partial afro doesn't suit nephew (5)
  6. 8. Mood gets upturned beneath mountain or volcano (9)
  7. 9. Man boat, there's 9 people in it! (10)
  8. 10. Shakespeare was a dragon slayer!? (4)
  9. 12. Wizard said to be cool but appalled? (8)
  10. 15. I hear one of ABBA is a shapeshifter! (5)
  11. 16. Some gal confused by a name no longer used (7)
  12. 18. Short librarian brought back some books for uncle (5)
  13. 19. NASA rum cocktail enslaves a village (7)
  14. 21. Hospital department found in forest (3)