Provoke fashionable celebrity about launch opening (7)
I believe the answer is:
inflame
'provoke' is the definition.
(inflaming is a kind of provoking)
'fashionable celebrity about launch opening' is the wordplay.
'fashionable' becomes 'in' ('in' can be similar in meaning to 'fashionable').
'celebrity' becomes 'fame' ('fame' can be a synonym of 'celebrity').
'about' is an insertion indicator.
'launch opening' becomes 'l' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'fame' enclosing 'l' is 'flame'.
'in'+'flame'='INFLAME'
Can you help me to learn more?
(Other definitions for inflame that I've seen before include "Provoke; aggravate" , "Excite passionate feelings" , "Incite" , "Intensify, aggravate" , "Be provocative" .)