Goat man? (5)
I believe the answer is:
billy
I believe this clue is a double definition.
'goat' is the first definition.
(billy is a kind of goat)
'man?' is the second definition.
(Other definitions for billy that I've seen before include "... boy" , "Light metal cooking pot used for camping" , "Goat; camper's kettle" , "The familiar male goat" , "Cooking can for William" .)