Extra purchase, reportedly (3)
I believe the answer is:
bye
'extra' is the definition.
(cricket term)
'purchase reportedly' is the wordplay.
'purchase' becomes 'buy' ('buy' can be a synonym of 'purchase').
'reportedly' indicates a 'sounds like' (homophone) clue.
'buy' sounds like 'BYE'.
(Other definitions for bye that I've seen before include "Run not off bat" , "Get one to advance to the next round without playing an opponent" , "(Informal) valediction" , "Farewell! (informal)" , "Cheerio" .)