"___, a deer, a female deer" (3)
I believe the answer is:
I believe this clue is a double definition.
'a deer' is the first definition.
'a female deer' is the second definition.
(I've seen this in another clue)
(Other definitions for doe that I've seen before include "Buck's mate" , "Female hare" , "Ode to a female rabbit" , "Animal" , "female in the field?" .)