Ballet is performed in prison (8)
I believe the answer is:
bastille
'prison' is the definition.
(I know that bastille is a type of prison)
'ballet is performed' is the wordplay.
'performed' indicates an anagram.
'ballet'+'is'='balletis'
'balletis' is an anagram of 'BASTILLE'.
'in' acts as a link.
(Other definitions for bastille that I've seen before include "Old Parisian prison" , "Paris prison stormed at the start of the French Revolution" , "Paris prison destroyed at the start of the French Revolution" , "Ballet is about notorious prison in Paris" , "Historic French prison" .)