Crossword Genius

Raucous-sounding raven, possibly, essential listening (6)

Ross

I believe the answer is:

croaky

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'raucous' is the definition.
(thesaurus)

I can't explain the rest of the clue.

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(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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