Changing an article can be quite a performance! (7)
I believe the answer is:
recital
'performance' is the definition.
(recital is a kind of performance)
'changing an article' is the wordplay.
'changing' indicates anagramming the letters.
'article' with letters rearranged gives 'RECITAL'.
'can be quite a' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for recital that I've seen before include "Musician's performance" , "Performance of music by soloist" , "Public performance of music" , "Maybe solo musical performance" , "Concert performed by a solo musician" .)