WHAT IS THE CONNECTION

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Across
  1. 3. flo kc
  2. 5. drumer
  3. 9. pur sum
  4. 10. when dresss
  5. 11. porto
  6. 12. only co
  7. 13. riped
  8. 15. warms
  9. 16. ratcheting
  10. 17. et elf
Down
  1. 1. que tube
  2. 2. lab err
  3. 4. rt clues
  4. 6. egg leg
  5. 7. uses bins
  6. 8. dehr
  7. 10. halos
  8. 13. platter
  9. 14. dogal