Bound to be a cellar (5)
I believe the answer is:
vault
I believe this is a double definition.
'bound' is the first definition.
(thesaurus)
'a cellar' is the second definition.
(I've seen this before)
'to be' is the link.
(Other definitions for vault that I've seen before include "Underground chamber - leap" , "You can do this with a pole" , "Jump over a crypt? (5)" , "Crypt; leap" , "Where bodies may be kept" .)