Large tomb (9)
I believe the answer is:
mausoleum
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large tomb</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 mausoleum that I've seen before include "Housing for a tomb" , "Large, stately tomb" , "gloomy site" , "Great tomb - usual memo (anag)" , "Sepulchre" .)