Eg, ermine (3)
I believe the answer is:
fur
'eg ermine' is the definition.
(ermine is a kind of fur)
This is the entire clue.
(Other definitions for fur that I've seen before include "Outer skin of animal with hair attached" , "Deposit lining kettles" , "Hairy animal coat" , "Coating formed on sick person's tongue (3)" , "Garment" .)