They take panes (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">they take panes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sashes that I've seen before include "They're worn over shoulders" , "They hold the glass in window frames" , "Broad bands worn over the shoulder" , "Fabric bands worn around body" , "Ornamental cloth bands me father wore in song?" .)