Reportedly splashes out for extras (4)
I believe the answer is:
byes
'extras' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for byes that I've seen before include "Runs wicketkeeper concedes" , "Extra runs" , "Scores" , "Runs not from bat" , "Wicketkeeper's concession" .)