An area to care about? (4)
I believe the answer is:
acre
'an area' is the definition.
(I've seen this before)
'care about?' is the wordplay.
'about?' indicates anagramming the letters (I've seen 'about' mean this).
'care' anagrammed gives 'ACRE'.
'to' is the link.
(Other definitions for acre that I've seen before include "A state of W Brazil" , "Care about the piece of land" , "Unit of area of 4,840 square yards" , "region of ground" , "once occupied by Crusaders" .)