Provoke fashionable quote (6)
I believe the answer is:
incite
'provoke' is the definition.
(I know that incite is a more specific form of the action provoke)
'fashionable quote' is the wordplay.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'quote' becomes 'cite' (synonyms).
'in'+'cite'='INCITE'
(Other definitions for incite that I've seen before include "Prompt" , "Egg on" , "Provoke - stimulate" , "Stir up, rouse to action" , "Whip up" .)