Strip off skin (4)
I believe the answer is:
flay
'strip off skin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for flay that I've seen before include "Strip the skin from (a carcass)" , "Skin alive" , "fleece" , "Strip skin off by whipping" , "Whip so as to remove skin" .)