Related Clues:

• "Joy to the World," e.g
• "Adeste Fideles," e.g
• Décembre event
• 'Hay Fever' author Coward
• Gallagher who didn't smash melons
• Sleigh ride song
• Sing door-to-door in December
• 'Christians Awake,' e.g
• "Silent Night," for one
• Wassailer's tune
• Coward from England
• "Private Lives" playwright Coward
• Songwriter Coward
• 'We Three Kings of Orient Are,' e.g
• Number by a door?