Crossword Genius

Monk's vinegary vocals (7)

Ross

I believe the answer is:

ascetic

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'monk's' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for ascetic that I've seen before include "Eremite" , "Religiously self-disciplined" , "Hermit" , "One who practises extreme self-discipline" , "Person who lives severely simple life" .)

I've seen this clue in the Sydney Morning Herald.
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