Moulding between ceiling and top of a wall (7)
I believe the answer is:
cornice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">moulding between ceiling and top of a wall</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cornice that I've seen before include "decorative feature" , "Moulding along top of building" , "Overhanging ledge of frozen snow" , "decorative part of room" , "Ornamental wall moulding" .)