Belt as part of a shirt (4)
I believe the answer is:
cuff
I believe this is a double definition.
'belt' is the first definition.
(both can mean to hit)
'part of a shirt' is the second definition.
(I've seen this before)
'as' acts as a link.
(Other definitions for cuff that I've seen before include "Wrist end of sleeve" , "beat" , "Part of a shirt sleeve - hit" , "Turned-back hem to sleeve" , "Light blow with the open hand" .)