Care for back (4)
I believe the answer is:
rear
This clue is a double definition.
'care for' is the first definition.
(I've seen this in another clue)
'back' is the second definition.
(something's rear is its back)
(Other definitions for rear that I've seen before include "Foster" , "Bring up (children)" , "Bring up - back end" , "Posterior" , "Breed or bring up" .)