Girl I care about (5)
I believe the answer is:
erica
'girl' is the definition.
'i care about' is the wordplay.
'about' is an anagram indicator.
'i'+'care'='icare'
'icare' with letters rearranged gives 'ERICA'.
(Other definitions for erica that I've seen before include "Heathland shrub; girl's name" , "growing up on the moors" , "Heath genus; girl's name" , "Girl's name - I care (anag)" , "found on the moors" .)