Provoke to action fashionable name (6)
I believe the answer is:
incite
'provoke to action' is the definition.
(I've seen this before)
'fashionable name' is the wordplay.
'fashionable' becomes 'in' ('in' can be similar in meaning to 'fashionable').
'name' becomes 'cite' (I've seen this in other clues**).
'in'+'cite'='INCITE'
(Other definitions for incite that I've seen before include "Encourage or stir up" , "Foment, urge on" , "Prompt" , "'Stir up, provoke (6)'" , "Stir up (trouble)" .)