Jump over tomb (5)
I believe the answer is:
vault
I believe this clue is a triple definition!
'jump' is the first definition.
(vaulting is a kind of jumping)
'over' is the second definition.
(thesaurus)
'tomb' is the third definition.
(vault is a kind of tomb)
(Other definitions for vault that I've seen before include "Leap; storage chamber" , "Where bodies may be kept" , "Strongroom or burial chamber" , "bound?" , "Spring - clear - cellar" .)