I care about Heather (5)
I believe the answer is:
erica
'i care about heather' is the definition.
(I've seen this before)
'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 "Girl's name - I care (anag)" , "Plant genus of garden heather" , "ling" , "Heathland shrub; girl's name" , "found on the moors" .)