Humiliation in a cellar (9)
I believe the answer is:
abasement
'humiliation' is the definition.
(abasement is a kind of humiliation)
'a cellar?' is the wordplay.
'cellar?' becomes 'basement' (both can mean the space underneath a house).
'a'+'basement'='ABASEMENT'
'in' is the link.
(Other definitions for abasement that I've seen before include "Putting down" , "will humiliate us" , "belittling" , "Humiliating situation" , "Mean beast (anag.)" .)