Concluding part of a performance (6)
I believe the answer is:
finale
'concluding part of a performance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for finale that I've seen before include "Last item of event" , "Conclusion of a piece of music" , "Last part of something" , "In leaf (anag.)" , "When it's grand, it's the last scene" .)