Crossword Genius

Is a fool to tease (4)

Ross

I believe the answer is:

twit

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'to tease' is the definition.
(synonyms)

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(Other definitions for twit that I've seen before include "dunce" , "Ninny" , "Silly fool" , "Idiot; tease" , "Bait - fool" .)

I've seen this clue in the Evening Standard.
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