Mr Oates, flawed genius (7)
I believe the answer is:
maestro
'genius' is the definition.
(I've seen this before)
'mr oates flawed' is the wordplay.
'flawed' indicates an anagram (I've seen this in other clues).
'mr'+'oates'='mroates'
'mroates' is an anagram of 'MAESTRO'.
(Other definitions for maestro that I've seen before include "Top music man" , "Master of an art, or a great conductor of music" , "Distinguished musician - most are (anag)" , "Master of any art, from Italian" , "Highly talented figure in a given field" .)