Pageant garment (4)
I believe the answer is:
sash
'pageant garment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sash that I've seen before include "Ribbon as a symbol of rank" , "type of cord?" , "Band of cloth" , "Style of window" , "Brown bread for waist or shoulder" .)