Talk at a location (7)
I believe the answer is:
address
I believe this is a double definition.
'talk' is the first definition.
(I've seen this before)
'a location' is the second definition.
(address is a kind of location)
'at' acts as a link.
(Other definitions for address that I've seen before include "Place where someone lives" , "hail maybe?" , "prepare for post" , "Discourse" , "Think about" .)