Fabulous relation (4)

I believe the answer is:

myth

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'fabulous relation' 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?

This is all the clue.

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(Other definitions for myth that I've seen before include "Widely held misconception" , "There's no truth in it" , "Wildly-held but false belief or idea" , "Delusion" , "Legend; fable" .)

I've seen this clue in The Globe and Mail.

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