Person at academy exhibits work (6)
I believe the answer is:
sonata
'work' is the definition.
(I've seen this before)
'person at academy exhibits' is the wordplay.
'exhibits' indicates the answer is hidden within the clue.
'SONATA' can be found hidden inside 'person at academy'.
(Other definitions for sonata that I've seen before include "Musical work for a solo instrument" , "Piece of classical music" , "Music for a soloist" , "Music to play (not sing)" , "Chamber work" .)