Raise the back (4)
I believe the answer is:
rear
I believe this is a double definition.
'raise' is the first definition.
(as in rearing children)
'back' is the second definition.
(something's rear is its back)
'the' is the link.
(Other definitions for rear that I've seen before include "Bring up or stand up on hind legs" , "Jump" , "Hindmost part" , "Hitchcock film set in one room" , "Hind part" .)