Mastermind (6)

I believe the answer is:

genius

'mastermind' is the definition.
(synonyms)

This is all the clue.

(Other definitions for genius that I've seen before include "Virtuoso" , "Person with extraordinary ability" , "Great mind" , "Exceptional intellectual power" , "Exceptionally intelligent person" .)

I've seen this clue in The Sun and The Telegraph.

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