Window over a door (7)
I believe the answer is:
transom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">window over a door</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 transom that I've seen before include "something seen in the window" , "Cross-beam" , "bolstering member" , "Horizontal bar across door for matrons" , "Bar above window or door" .)