Exhibitionist in French street, thus quietly revolting (6)
I believe the answer is:
poseur
'exhibitionist' is the definition.
(poseur is a kind of exhibitionist)
'french street thus quietly revolting' is the wordplay.
'french street' becomes 'rue' (French for street or road).
'thus' becomes 'so' (synonyms).
'quietly' becomes 'p' (p for piano and quiet).
'revolting' says the letters should be written backwards.
'rue'+'so'+'p'='ruesop'
'ruesop' reversed gives 'POSEUR'.
'in' acts as a link.
(Other definitions for poseur that I've seen before include "Person habitually pretending to be something he is not" , "Pretentious person" , "Pretentious type" , "Exhibitionist" , "One shows off to impress" .)