Delete from opera season (5)
I believe the answer is:
erase
'delete' is the definition.
(I know that delete can be written as erase)
'from opera season' is the wordplay.
'from' indicates the answer is hidden within the clue.
'ERASE' can be found hidden inside 'opera season'.
(Other definitions for erase that I've seen before include "Blank out" , "To remove all trace" , "Kill" , "Destroy recording on audio or video tape" , "Remove evidence of" .)