So long getting two runs (3-3)
I believe the answer is:
bye-bye
'so long' is the definition.
(I know that so long can be written as bye-bye)
'getting two runs' is the wordplay.
'two runs' means two replacements for 'run'.
'getting' says to put letters next to each other.
'run' becomes 'bye' (type of cricket run).
'run' becomes 'bye' (type of cricket run).
'bye' put after 'bye' is 'BYE-BYE'.
(Other definitions for bye-bye that I've seen before include "Ta-ta" , "See you" , "Cheerio" , "Adieu" , "So long" .)