It's a funny thing (6)
I believe the answer is:
scream
'a funny thing' is the 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 don't see?
'it's' is the wordplay.
I cannot quite understand how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is located in the answer.
The remaining letters 'scram' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for scream that I've seen before include "Scar me (anag)" , "'Loud, high-pitched cry (6)'" , "A shrill yell as from fright" , "Person who seems extremely funny?" , "Call for" .)