Mother’s crazy rise (3)
I believe the answer is:
dam
'mother's' is the definition.
(female parent of an animal)
'crazy rise' is the wordplay.
'crazy' becomes 'mad' (synonyms).
'rise' is a reversal indicator.
'mad' written backwards gives 'DAM'.
(Other definitions for dam that I've seen before include "Wall restraining water" , "Mother of quadruped" , "Female parent; obstruction" , "A mad kind of mum" , "Hold back; mother" .)