Bring up backside? (4)
I believe the answer is:
rear
This clue is a triple definition!
'bring' is the first definition.
(thesaurus)
'up' is the second definition.
(thesaurus)
'backside?' is the third definition.
(I know that backside can be written as rear)
(Other definitions for rear that I've seen before include "Bring up and care for" , "Rare at the back" , "what you may bring up" , "Foster" , "The back part of something" .)