Woolly garment for a cow? (6)
I believe the answer is:
jersey
This clue is a triple definition!
'woolly' is the first definition.
(I've seen this before)
'garment' is the second definition.
(jersey is a kind of garment)
'for a cow?' is the third definition.
(I've seen this before)
(Other definitions for jersey that I've seen before include "Channel Island - cow" , "One of the Channel Islands" , "farm animal" , "lower?" , "Pullover; an island" .)