A light touch from banks kicking up a fuss (4)
I believe the answer is:
kiss
'a light touch' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for kiss that I've seen before include "(Of snooker ball) touch gently; X represents it" , "x (that may be French)" , "Neck - peck" , "Smooch" , "Salute" .)