Buck or fawn (4)
I believe the answer is:
deer
I believe this clue is a double definition.
'buck' is the first definition.
(buck can mean a male deer)
'fawn' is the second definition.
(thesaurus)
(Other definitions for deer that I've seen before include "Eg, stag or doe" , "Ruminant(s) -- breed of 13 down" , "maybe does" , "The - Hunter, 1978 film" , "Hoofed mammal" .)