23

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Across
  1. 2. - Intelligent marine mammal (7 letters)
  2. 4. - Nut in a hard shell (6 letters)
  3. 9. - Large reptile (9 letters)
  4. 10. - Flying machine (8 letters)
  5. 12. - Smooth stone (6 letters)
  6. 14. - Rain protection (8 letters)
  7. 18. - Red, juicy fruit (10 letters)
  8. 19. - Dog breed (6 letters)
Down
  1. 1. - Larval stage of a butterfly (11 letters)
  2. 3. - Small, nectar-feeding bird (11 letters)
  3. 5. - Large mammal with tusks (8 letters)
  4. 6. - Humorous entertainment (6 letters)
  5. 7. - Flightless bird (7 letters)
  6. 8. - Container for carrying (6 letters)
  7. 11. - Starchy tuber (6 letters)
  8. 13. - Elastic material (6 letters)
  9. 15. - Yellow fruit (6 letters)
  10. 16. - Western rider (6 letters)
  11. 17. - Citrus fruit (6 letters)
  12. 20. - Tall African mammal (7 letters)