Sliding window frames (6)
I believe the answer is:
sashes
'sliding window frames' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sashes that I've seen before include "Ornamental cloth bands me father wore in song?" , "Bands of material around waists or shoulders" , "Fabric bands worn around body" , "Ornamental cloth strips me father wore musically" , "Bands around the waist or chest" .)