Farm female's in Bridewell (3)
I believe the answer is:
ewe
'farm female's' is the definition.
(female sheep)
'in bridewell' is the wordplay.
'in' indicates the answer is hidden within the clue.
'EWE' is hidden within 'bridewell'.
(Other definitions for ewe that I've seen before include "Wool producer" , "Female ovine" , "Palindrome for a female sheep" , "Wool supplier" , "The sort of beast" .)