Raucous-sounding raven, possibly, essential listening (6)
I believe the answer is:
croaky
'raucous' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Another definition for croaky that I've seen is " Hoarse like a frog".)
I've seen this clue in The Independent.
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