Agreement as communicated (6)
I believe the answer is:
assent
'agreement' is the definition.
(assent is a kind of agreement)
'as communicated' is the wordplay.
'communicated' becomes 'sent' (sending is a kind of communicating).
'as'+'sent'='ASSENT'
(Other definitions for assent that I've seen before include "Say yes" , "Give consent" , "Agree, acquiesce" , "Acquiesce, comply" , "Give the thumbs-up" .)