He sounds less than judicious (4)

I believe the answer is:

jude

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'he sounds less than judicious' is the definition.
The definition suggests a singular noun which matches the answer.

'he sounds less' is the wordplay.
'he' becomes 'jud'.
'sounds less' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'jud'+'e'='JUDE'

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(Other definitions for jude that I've seen before include "'Hey -- ' (Beatles)" , "Patron saint of hopeless cases" , "Patron saint of hopeless causes" , "Hardy's ' - - the Obscure'" , "Hardy hero" .)

I've seen this clue in the Evening Standard.

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