Extended use of language and excessive and immoderate verbosity or circumlocution perhaps is misjudged when involved with separate touches of irony and rodomontade (11)
I believe the answer is:
periphrasis
'rodomontade' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
I can't explain the rest of the clue.
Can you help me to learn more?
(Another definition for periphrasis that I've seen is " Circumlocutory speech".)
I've seen this clue in The Independent.
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