I'm back with money for betting slips (8)
I believe the answer is:
mistakes
'slips' is the definition.
('mistake' can be a synonym of 'slip')
'i'm back with money for' is the wordplay.
'back' is a reversal indicator.
'with' means one lot of letters go next to another.
'money for' becomes 'stakes' (I can't justify this - if you can you should believe this answer much more).
'im' written backwards gives 'mi'.
'mi'+'stakes'='MISTAKES'
'betting' acts as a link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for mistakes that I've seen before include "Errors" , "Misguided or wrong acts" , "Blunders, slips" .)