Large tomb (9)
I believe the answer is:
mausoleum
'large tomb' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)