Any animal with two feet (5)
I believe the answer is:
biped
'any animal with two feet' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for biped that I've seen before include "Man, say" , "One standing on two feet" , "Two legged creature" , "Two-footed animal" , "Primate, for example" .)