Robe closer (4)
I believe the answer is:
sash
'robe closer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sash that I've seen before include "Strip of cloth worn round the waist" , "Style of window" , "Long strip of material - window frame" , "Part of a window - decoration" , "Band worn over shoulder or round waist" .)