Rare kiss for hillbilly (7)
I believe the answer is:
redneck
'hillbilly' is the definition.
(thesaurus)
'rare kiss' is the wordplay.
'rare' becomes 'red' (as in a red steak).
'kiss' becomes 'neck' (neck can informally mean to kiss).
'red'+'neck'='REDNECK'
'for' is the link.
(Other definitions for redneck that I've seen before include "S. US working-class white conservative (derog.)" , "Intolerant American" , "Poor white called this" , "Poor white American" , "Ignorant bigot" .)