Sermon maybe in specific location (7)
I believe the answer is:
address
This clue is a double definition.
'sermon maybe' is the first definition.
(I know that discourse is a type of address)
'specific location' is the second definition.
(a particular address)
'in' is the link.
(Other definitions for address that I've seen before include "directions in window" , "Place where someone lives" , "Deliver a speech" , "Place of abode" , "Treat" .)