Troubadour married in street on left (8)
I believe the answer is:
minstrel
'troubadour' is the definition.
(I know that troubadour can be written as minstrel)
'married in street on left' is the wordplay.
'married' becomes 'm'.
'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 "Nanki-Poo, for instance" , "Travelling musician of the middle ages" , "Strolling player" , "Mediaeval entertainer" , "Medieval wandering musician" .)