The flair of Michelangelo (4)
I believe the answer is:
elan
'the flair' is the definition.
('elan' can be a synonym of 'flair')
'of michelangelo' is the wordplay.
'of' indicates a hidden word.
'ELAN' can be found hidden inside 'michelangelo'.
(Other definitions for elan that I've seen before include "Style and verve" , "Impetuosity - style" , "Snap" , "Vitality" , "Energy, style and enthusiasm" .)