Part of the church making fortune -- pounds! (7)
I believe the answer is:
chancel
'part of the church' is the definition.
('chancel' is part of 'church')
'fortune pounds' is the wordplay.
'fortune' becomes 'chance' ('chance' can be a synonym of 'fortune').
'pounds' becomes 'l' (L can represent the monetary pound).
'chance'+'l'='CHANCEL'
'making' is the link.
(Other definitions for chancel that I've seen before include "where choir sits" , "space for choir" , "Part of church containing altar" , "Place of altar" , "church, partly" .)