Superannuated part in tragedy (4)
I believe the answer is:
'superannuated' is the definition.
(I've seen this in another clue)
'part in tragedy' is the wordplay.
'part in' indicates the answer is hidden within the clue.
'AGED' is hidden in the letters of 'tragedy'.
(Other definitions for aged that I've seen before include "not a modern copy" , "well over the hill" , "Senior" , "Grew old" , "Long in the tooth" .)