Possible Clues:

• December doorstep number
• Time to carol
• Word often used in carols for Christmas
• Joyeux time of year
• 'The Seven Joys of Mary,' e.g.
• Talented Coward
• Coward in drama
• What 21-, 41- or 61-Across is ... and, phonetically, a curiously apt common feature of those answers
• Liam Gallagher's brother
• "Jingle Bells," e.g