Winter neck warmer (5)
I believe the answer is:
'winter neck warmer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for scarf that I've seen before include "Neckerchief - timber joint" , "Piece of cloth" , "Winter neckwear" , "Garment for wrapping; muffler" , "Garment worn around head or neck" .)