Musical racing driver (8)
I believe the answer is:
hamilton
This clue is a double definition.
'musical' is the first definition.
(I know that Hamilton is a musical)
'racing driver' is the second definition.
(Lewis Hamilton)
(Other definitions for hamilton that I've seen before include "lover of Nelson" , "Scottish town" , "Capital of Bermuda -- musical (opened in New York, 2015)" , "Emma --, Nelson's lover" , "Emma -, Nelson's mistress" .)