Sway belt (5)
I believe the answer is:
clout
I believe this clue is a double definition.
'sway' is the first definition.
(I've seen this in another clue)
'belt' is the second definition.
(thesaurus)
(Other definitions for clout that I've seen before include "Old-fashioned garment" , "Cast not one before May is out" , "strike" , "Hit - influence" , "Swipe" .)