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 sure about the 'stage' bit.
'provoked a stir and emptied theatre' is the subsidiary indication.
'provoked' indicates anagramming the letters.
'and' says to put letters next to each other.
'emptied' suggests removing the centre.
'theatre' with its centre removed is 'te'.
'astir' is an anagram of '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".)