Wool fat (7)
I believe the answer is:
lanolin
'wool fat' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for lanolin that I've seen before include "Secretion on wool" , "Wool extract used in some ointments" , "Oily substance on wool" , "Fat extracted from wool" , "Wool fat used in ointments" .)