Wool swindle (6)
I believe the answer is:
fleece
I believe this is a double definition.
'wool' is the first definition.
(I know that wool can be written as fleece)
'swindle' is the second definition.
(I've seen this in another clue)
(Other definitions for fleece that I've seen before include "thermal garment" , "Cheat" , "Warm coat; swindle" , "warm garment" , "Overcharge" .)