A PUZZLING XMAS

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Across
  1. 3. 3-legged
  2. 6. Mountain biking casualty
  3. 8. Abandoned studies
  4. 9. Favourite child
  5. 10. A tradition for 20 years
  6. 14. The best parade
  7. 15. A very random store
  8. 16. Where’s my snag?
  9. 17. Something left out in the sun
  10. 20. A chefs tool
  11. 21. 18 classes
Down
  1. 1. Easy 100% result
  2. 2. An old name
  3. 4. Favourite song artist
  4. 5. Porch activity
  5. 7. Do you want cheese with that?
  6. 11. An odorous ships cargo
  7. 12. Mr Trump what is your next useless idea? I will rename a place for no reason
  8. 13. An entertaining ___ ride for everyone but you
  9. 16. Childhood snow action
  10. 18. Mums most common enquiry: ____ is Dad?
  11. 19. In a storm…