Alternative form of aye? (3)
I believe the answer is:
yea
This clue could be a double definition.
'alternative form' is the first definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'aye?' is the second definition.
(I've seen this in another clue)
'of' is the link.
Can you help me to learn more?
(Other definitions for yea that I've seen before include "Archaic affirmative answer" , "Affirmative in the British Parliament" , "'She loves you, ... ... ...' (The Beatles)" , "Approval" , "Verily" .)