Three-toed mammal (5)
I believe the answer is:
tapir
'three-toed mammal' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tapir that I've seen before include "Hoofed mammal; I trap (anag.)" , "Nocturnal mammal with a short flexible proboscis" , "nocturnal beast" , "I part with the pig-like animal" , "creature" .)