Loss of money earned over players -- 100's missing (7)
I believe the answer is:
wastage
'loss' is the definition.
(wastage is a kind of loss)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for wastage that I've seen before include "natural decay" , "Loss through careless use" , "Unprofitable spending" , "exhausting" , "Useless spending" .)