Reportedly purchase extra (3)
I believe the answer is:
bye
'extra' is the definition.
(cricket term)
'reportedly purchase' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'purchase' becomes 'buy' ('buy' can be a synonym of 'purchase').
'buy' is a homophone of 'BYE'.
(Other definitions for bye that I've seen before include "[ADIEU]" , "Cricketing extra" , "Stay out of round" , "Farewell! (informal)" , "So long" .)