Exotic leather (3)
I believe the answer is:
eel
'exotic leather' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eel that I've seen before include "Moray or electric, for instance" , "Ribbon-like fish" , "Proverbially slippery fish" , "Long thin fish" , "Snake-like sea creature" .)