Merry Christmas, Austin

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Across
  1. 3. Fall Out Boy sings a holiday song whose name starts with this holiday log
  2. 5. "Bah, humbug!" - _________
  3. 8. In lieu of gifts, naughty children can expect a visit from this half-goat, half-demon
  4. 9. You should leave these baked snacks for a weary midnight Christmas traveller
  5. 13. x ∞ +1
  6. 15. Finish this clue, and hopefully you'll find one of your ______
  7. 16. Santa's childhood home (according to your bf's favorite Christmas movie)
  8. 17. Shiny baubles for firs and evergreens
  9. 18. A previous Christmas gift from WHAM!
  10. 19. Dwight brought this jolly German character to life at one of Dunder Mifflin's Christmas parties
  11. 20. These holiday processions usually end with Santa Clause making an appearance
  12. 21. Come and trim my Christmas tree, with some decorations bought at ________
Down
  1. 1. Holiday helpers
  2. 2. I want a Red ______, carbine action, 200 shot range, model air rifle
  3. 4. A festive leaf, also used as a popular name for girls
  4. 6. He lights the way on foggy Christmas nights
  5. 7. In the late 80's this reindeer had his own movie made
  6. 10. Elvis may be having a "blue Christmas" but our song involves another "blue" time of year
  7. 11. If you're not a fan of soiled laundry, you may want this cousin to steer clear of your microwave
  8. 12. A "great" brother for P
  9. 14. A Christmas tree by any other name
  10. 15. Christmas flower