Row in world of Roman Church (7)
I believe the answer is:
terrace
'row' is the definition.
(I've seen this before)
'world of roman church' is the wordplay.
'world of roman' becomes 'Terra' ('Earth' in Latin).
'church' becomes 'CE' (abbreviation for Church of England).
'terra'+'ce'='TERRACE'
'in' is the link.
(Other definitions for terrace that I've seen before include "Balcony" , "From which spectators watch" , "Row of housing" , "Domestic row" , "Retrace (anag.)" .)