Cervine animal (4)
'cervine animal' 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 "Hoofed grazing animal" , "Grazing animal(s)" , "Antlered animal" , "See 23" , "Bucks and does?" .)
(Other definitions for doe that I've seen before include "Female hare" , "She's a deer" , "Feminine counterpart of stag" , "Female kangaroo" , "female of the species" .)