AGM elected known members with affirmation (15)
I believe the answer is:
acknowledgement
'affirmation' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'agm elected known members' is the wordplay.
'agm elected known' anagrams to 'ACKNOWLEDGEMENT'.
Though, I am not clear how this is indicated.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for acknowledgement that I've seen before include "Confession; thanks" , "admission" , "profession" .)