Hmmm, although it may be large in dimensions it is really quite small in difficulty. Lots of festive references with a couple of carols and a couple of pantomimes and one clue about a musical game of which I had never heard. Favourite clue? Well its a bit hard to pick, but these two are quite good:
20D Dash in the off-licence? (6)
49D Mind-reading skill needs old grass (7)
Enjoy.