Tyson —, 2007 World Championships 100m and 200m gold medallist (3)

I believe the answer is:

gay

(Other definitions for gay that I've seen before include "Writer of The Beggar's Opera" , "Merry" , "Homosexual" , "Brightly coloured" , "John --, author of 'The Beggar's Opera'" .)

I've seen this clue in The Mirror.

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