Frame containing the panes of a window (4)

I believe the answer is:

sash

(Other definitions for sash that I've seen before include "Sliding window frame" , "Band worn over shoulder or round waist" , "Waistband - type of window" , "Decoration for the twelfth" , "Framework to hold the panes of a window" .)

I've seen this clue in The Times.

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