Poetry item with myths at the core (7)
I believe the answer is:
couplet
'poetry' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'item with myths at the core' is the wordplay.
I cannot really see how this works, but
'item' could be 'couple' (I've seen this before) and 'couple' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for couplet that I've seen before include "Pair of verse lines" , "Two lines of verse, often rhyming" , "piece of poetry" , "bit of poetry" , "Two successive lines of verse, usually rhyming" .)