The solution might be something you've not heard before (9)
I believe the answer is:
neologism
'the solution' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for neologism that I've seen before include "Brexit maybe" , "Newly-coined word or expression" , "Newly coined word" , "New word or phrase" , "new term" .)