Cellar (5)
'cellar' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for vault that I've seen before include "Spring - clear - cellar" , "bound?" , "Bank's strongroom" , "Burial chamber - jump across" , "Leap - wine or money chamber?" .)
'cellar' is the definition.
(synonyms)
This is all the clue.
(Other definitions for root that I've seen before include "radical" , "Solution of equation" , "Turn up with the snout." , "Underground growth" , "grub" .)