Raid fashionable street (6)
I believe the answer is:
inroad
'raid' is the definition.
(inroad can mean a raid or attack)
'fashionable street' is the wordplay.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'street' becomes 'road' (I've seen this in another clue).
'in'+'road'='INROAD'
(Other definitions for inroad that I've seen before include "Offensive" , "One's intrusive" , "Foray" , "Encroachment; hostile attack" , "Encroachment, intrusion" .)