Related Clues:

• Left a long time back -- Christmas maybe
• One switching back to channel 8
• Boy heading west in 28
• Fellow who�s drunk 1 litre
• See 7 Across
• Christmas verse taken from A Christmas Carol, say
• Christmas 'caro' with this, did you say?
• Middle torn from book, this time?
• Prize-giver losing heart for the present time
• "O Holy Night," for one
• Cold-season air
• 'O Sanctissima,' e.g
• Holiday-time song
• Festive piece
• The season to be jolly