Sell a pup with woolly coat (6)
I believe the answer is:
fleece
'woolly coat' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for fleece that I've seen before include "Swindle; sheep's coat" , "Charge too much" , "Rob by trickery, say sheep" , "Diddle" , "Sheep's woollen coat" .)