Window section (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">window section</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pane that I've seen before include "Panel of glass" , "Piece of glass in window" , "Single sheet of glass in a window" .)
(Other definitions for sill that I've seen before include "Mass of rock" , "Horizontal timber forming the bottom of a framework" , "Slab at foot of window" , "Underwater rock ledge" , "Window edge" .)