An extra farewell (3)
I believe the answer is:
bye
This clue is a double definition.
'an 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 "Run not off bat" , "See you" , "I'm off" , "Run scored in cricket from a ball that passes batman" , "Extra run; farewell" .)