Stage performer provoked a stir and emptied theatre (7)
I believe the answer is:
Here is my best explanation:
'stage performer' is the definition.
'artiste' can be an answer for 'performer' (artiste is a kind of performer). I am not certain of the 'stage' bit.
'provoked a stir and emptied theatre' is the wordplay.
'provoked' indicates anagramming the letters.
'and' says to put letters next to each other.
'emptied' means to remove the middle letters.
'theatre' with its centre taken out is 'te'.
'astir' anagrammed gives 'artis'.
(Other definitions for artiste that I've seen before include "Dancer", "Tears it (anag.)", "Attires like entertainer", "Attires (anag.)", "A professional entertainer", "Player", "One entertaining", "An entertainer", "Singer, dancer" and "Professional entertainer".)