Rip off woolly covering (6)
I believe the answer is:
fleece
This could be a double definition.
'rip off' is the first definition.
(I know that fleece is a more specific form of rip off)
'woolly covering' is the second definition.
'fleece' can be an answer for 'covering' (fleece is a kind of covering). I'm unsure of the 'woolly' bit.
Can you help me to learn more?
(Other definitions for fleece that I've seen before include "Swindle; sheep's coat" , "Woolly hair of sheep" , "thermal garment" , "Wool, of a sheep perhaps" , "Rob by trickery, say sheep" .)