Extra farewell (3)
I believe the answer is:
bye
I believe this clue is a double definition.
'extra' is the first definition.
(cricket term)
'farewell' is the second definition.
(bye is a kind of farewell)
(Other definitions for bye that I've seen before include "See you" , "So long" , "Extra run; farewell" , "I'm off" , "Reason not to play" .)