Merry Christmas

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Across
  1. 6. Guardian angel in 'It's a Wonderful Life' (8)
  2. 11. German name for Christmas (10)
  3. 12. Christmas film starring Martin Freeman(8)
  4. 13. a decoration whose name comes from the Old French word 'estincele' (6)
  5. 15. Author of 'How the Grinch stole Christmas' (2,5)
  6. 17. juice used in a Cosmopolitan cocktail (9)
  7. 18. Latin name for ivy (6)
  8. 21. country which donates the Trafalgar Square Christmas tree (6)
  9. 22. character played by Burt Ward in a 1960s series (5)
Down
  1. 1. One of Santa's reindeer (6)
  2. 2. traditionally burnt on a hearth at Christmas (4,3)
  3. 3. a feeder made of carved stone or wood (6)
  4. 4. ... roasting on a open fire (9)
  5. 5. English name of a carol composed in 1818 in Austria (6,5)
  6. 7. bird which Benjamin Franklin wanted to make the nation bird of the US (6)
  7. 8. the more common name for St Stephen's Day (6,3)
  8. 9. Parasitic plant - latin name 'viscum album' (9)
  9. 10. In the meadow we can build a snowman, then pretend that he is ... (6,5)
  10. 14. city whose Christmas market is affiliated with one held in Birmingham (9)
  11. 16. name of one of the Wise Men (8)
  12. 19. time leading to Christmas Day, from the latin word for 'arrival' (6)
  13. 20. a gift given by one of the Wise Men (5)