Raise backside (4)
I believe the answer is:
rear
This clue is a double definition.
'raise' is the first definition.
(as in rearing children)
'backside' is the second definition.
(synonyms)
(Other definitions for rear that I've seen before include "Raise - back" , "Rump" , "Breed or bring up" , "parent" , "Bring up - the tail" .)