Address, oration (6)
I believe the answer is:
speech
I believe this clue is a double definition.
'address' is the first definition.
(I know that address can be written as speech)
'oration' is the second definition.
(I know that oration can be written as speech)
(Other definitions for speech that I've seen before include "Oration or talk" , "Oral form of communication" , "words" , "Oration, address" , "Formal discourse to an audience" .)