Spiky winter hanger (6)
I believe the answer is:
icicle
'spiky winter hanger' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for icicle that I've seen before include "Tree D [DECORATION]" , "Frozen finger of liquid" , "Frozen water drops" , "Winter hanger" , "Hanging piece of ice" .)