Sepulchre, burial vault (4)
I believe the answer is:
tomb
I believe this is a double definition.
'sepulchre' is the first definition.
(I've seen this before)
'burial vault' is the second definition.
(I've seen this in another clue)
(Other definitions for tomb that I've seen before include "Resting place" , "Large vault" , "Burial chamber" , "Sepulchre" , "Building for a body" .)