Christmas in July

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Across
  1. 2. It comes with a paper crown but isn't royalty (6)
  2. 4. Another word for present (4)
  3. 6. Festive greenery found in "Deck the Halls" (5)
  4. 8. Carol encouraging festive decorating (4,3,5)
  5. 10. Snowman who came to life in song (6)
  6. 11. Heavenly choir heard in several Christmas hymns (6)
  7. 12. Second day of Christmas (6,4)
  8. 14. Festive biscuit often made into houses (11)
  9. 15. Fairy who reigns over the Land of Sweets (9)
  10. 16. It guided the wisemen and tops many Christmas Trees (4)
  11. 18. Santa's door (7)
Down
  1. 1. Winter setting for a popular festive song (10)
  2. 3. Christmas movie character "Buddy" (3)
  3. 5. A train that takes you to the North Pole (2,5,7)
  4. 7. Wham!'s festive heartbreak hit (4,9)
  5. 9. Tchaikovsky's Famous Ballet (10)
  6. 13. Who stole Christmas (3,6)
  7. 17. They're roasting on an open fire (9)