Crossword Genius

He may even sound somewhat unreliable! (4)

Ross

I believe the answer is:

liar

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'he may even sound somewhat unreliable' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

This is all the clue.

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(Other definitions for liar that I've seen before include "Perjurer" , "man of fiction?" , "Bearer of false witness" , "Fabricator" , "not straight [one]" .)

I've seen this clue in the Evening Standard.
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