Kind of deer (3)
I believe the answer is:
roe
'kind of deer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for roe that I've seen before include "Mass of fish's eggs" , "Hoofed animal(s)" , "Lobster's ripe ovary" , "Food from fish" , "eg Caviare" .)