Flay (4)
'flay' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for excoriate that I've seen before include "roast" , "Flay" .)
'flay' is the definition.
(I know that flay is a more specific form of skin)
This is the entire clue.
(Other definitions for skin that I've seen before include "External membrane of body" , "Outer layer of, eg, apple" , "Scrape, as the knee" , "Personal cover?" , "Pelt" .)