Heather, I care about (5)
I believe the answer is:
erica
'heather' is the definition.
(the plant genus Erica includes heather plants)
'i care about' is the wordplay.
'about' is an anagram indicator.
'i'+'care'='icare'
'icare' is an anagram of 'ERICA'.
(Other definitions for erica that I've seen before include "Heather's Latin name?" , "hardy shrub" , "Shrub genus; girl's name" , "Plant of the heath genus" , "Heather, for instance" .)