Small ungulate (3,4)
I believe the answer is:
roe deer
'small ungulate' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for roe deer that I've seen before include "beast" , "Small hoofed animal from Eurasia" , "Hoofed animal(s)" , "Common wild animal" , "Small (antlered) mammal" .)