Common Denominator?

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Across
  1. 2. an abundance of pet
  2. 6. ,.....and are one of my best friends
  3. 8. little thing
  4. 10. you might say this when amused
  5. 11. a handyman may do
  6. 15. don't want her around
  7. 16. and a denomination
  8. 17. a monarch might flutter
  9. 18. he has 3 nipples!?
  10. 19. game for one
Down
  1. 1. eight of pet
  2. 3. Lickens worst fear
  3. 4. No
  4. 5. again (sorry :-))
  5. 6. Craig,oh! yes please
  6. 7. and thumper, disney duo from 1942
  7. 9. repeat performer
  8. 12. loving psychopath
  9. 13. help me
  10. 14. letter
  11. 15. scary fish film