Elevated speech from founder, losing one argument (8)
I believe the answer is:
falsetto
'elevated speech' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'founder losing one argument' is the wordplay.
'founder losing one' becomes 'fal' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'argument' becomes 'set to' (I've seen this in another clue).
'fal'+'setto'='FALSETTO'
'from' is the link.
Can you help me to learn more?
(Other definitions for falsetto that I've seen before include "Artificially high voice pitch" , "Flat toes (anag.)" , "Extra high male singing voice" , "Unnaturally high voice" , "Artificial upper register of a male voice" .)