Warming winter drink (5)
I believe the answer is:
cocoa
'warming winter drink' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cocoa that I've seen before include "Reddish brown" , "It's made from the seed of the cacao tree" , "Nighttime drink" , "Popular chocolate drink" , "Evening drink taken in rococo amphitheatre" .)