Crossword Genius

Certain contentment after dismissal of plea (4)

Ross

I believe the answer is:

sure

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'certain' is the definition.
(synonyms)

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(Other definitions for sure that I've seen before include "Safe" , "Completely confident that one is right" , "Definite" , "Confident sort of ruse" , "Agreed" .)

I've seen this clue in The Times.
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