Creature with two feet (5)
I believe the answer is:
biped
'creature with two feet' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for biped that I've seen before include "One walking on two legs" , "Toddler is an example" , "Two-legged creature" , "Two-footed animal" , "Animal walking on two feet" .)