Musician's male in street on left (8)
I believe the answer is:
minstrel
'musician's' is the definition.
(minstrel is a kind of musician)
'male in street on left' is the wordplay.
'male' becomes 'm' (common abbreviation).
'street' becomes 'st' (abbreviation).
'on' becomes 're' ('on' can be mean 'with reference to').
'left' becomes 'l' (common abbreviation).
'm'+'in'+'st'+'re'+'l'='MINSTREL'
(Other definitions for minstrel that I've seen before include "Balladeer" , "Jongleur" , "one entertains" , "Wandering musician of old" , "Singer of folk songs" .)