Kiss dollar bill (7)
I believe the answer is:
smacker
I believe this is a triple definition!
'kiss' is the first definition.
(I know that smacker is a type of smack)
'dollar' is the second definition.
(thesaurus)
'bill' is the third definition.
(thesaurus)
(Other definitions for smacker that I've seen before include "Loud kiss -- PS1" , "pound" , "Loud kiss - GBP1" , "someone taking part in strike?" .)