Subdue a female (3)
I believe the answer is:
cow
This clue is a double definition.
'subdue' is the first definition.
(as in cowing someone into submission)
'a female' is the second definition.
(I've seen this before)
(Other definitions for cow that I've seen before include "Female domestic mammal" , "Frighten into submission" , "Intimidate, female ox" , "Intimidate; milk producer" , "Subdue the spirit" .)