Frank may have performed (6)
I believe the answer is:
candid
'frank' is the definition.
('candid' can be a synonym of 'frank')
'may have performed' is the wordplay.
'may' becomes 'can' ('can' can be a synonym of 'may').
'have' says to put letters next to each other.
'performed' becomes 'did' ('do' can be a synonym of 'perform').
'can'+'did'='CANDID'
(Other definitions for candid that I've seen before include "Free and frank" , "Impartial" , "Frank, honest" , "Honest and open about what one thinks" , "Frank and outspoken" .)