See one in total bliss (7)
I believe the answer is:
elysium
'bliss' is the definition.
(thesaurus)
'see one in total' is the wordplay.
'see' becomes 'ely' (example where cathedral located in diocese).
'one' becomes 'i' (Roman numeral).
'in' is an insertion indicator.
'total' becomes 'sum' ('sum' can be a synonym of 'total').
'i' going within 'sum' is 'sium'.
'ely'+'sium'='ELYSIUM'
(Other definitions for elysium that I've seen before include "State of perfect bliss" , "Home of the blessed after death (Greek myth)" , "Slimy EU (anag.)" , "Classical heaven" , "Paradise of Greek myth for heroes and virtuous people" .)