Hoofed mammal — or husky, do we hear? (5)
I believe the answer is:
horse
'hoofed mammal' is the definition.
(horse is a kind of hoofed mammal)
'husky do we hear?' is the wordplay.
'husky' becomes 'hoarse' ('hoarse' can be a synonym of 'husky').
'do we hear?' shows a homophone (sound like).
'hoarse' sounds like 'HORSE'.
'or' acts as a link.
(Other definitions for horse that I've seen before include "Mount" , "Drier" , "Nag, hack" , "Eg, mare" , "charger?" .)