Harts and hinds (4)
I believe the answer is:
deer
'harts and hinds' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for deer that I've seen before include "Ruminant(s) -- breed of 13 down" , "Red, roe or fallow" , "Hoofed grazing animal" , "Hoofed animals" , "The male is a stag" .)