Clearly the speaker doesn't suffer from it (10)

I believe the answer is:

hoarseness

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

I don't understand the rest of the clue.

(Other definitions for hoarseness that I've seen before include "Roughness of voice" , "Rough, harsh quality (of voice)" , "Harshness of voice" .)

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

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