Anrheg Nadolig Llyr

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Across
  1. 3. Forth of Twelve
  2. 5. Three-time Olympics Host
  3. 6. Wave cereal bowl
  4. 10. the x in '2x4'
  5. 12. One often needing changing
  6. 13. Damp fog hides nothing
  7. 14. Terrain ruined coach
  8. 15. Apply some simple mentoring
  9. 16. former province of France
  10. 18. a kind of crowd
  11. 19. sweet stall
Down
  1. 1. during, quaintly
  2. 2. procession
  3. 4. erectable
  4. 7. between before and after
  5. 8. throwing a few back
  6. 9. Can Steve Eaves
  7. 11. kind of agent
  8. 17. Shopkeeper sounds ruder