Rock band with light touch (4)
I believe the answer is:
kiss
This clue is a double definition.
'rock band' is the first definition.
(US rock band)
'light touch' is the second definition.
(kiss can mean to brush against lightly)
'with' acts as a link.
(Other definitions for kiss that I've seen before include "Neck - peck" , "Buss" , "Act of osculation" , "Peck, smacker, X" , "drop of wax" .)