Cashback for item in all other across answers here (4)
I believe the answer is:
tool
'cashback' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'for item in all other across answers here' is the wordplay.
'for' becomes 'to' (eg both can mean 'in the opinion of').
'item in all other across answers here' becomes 'ol' (I can't explain this - if you can you should give a lot more credence to this answer).
'to'+'ol'='TOOL'
Can you help me to learn more?
(Other definitions for tool that I've seen before include "organ" , "Pawn" , "Person used by another" , "For example, saw" , "Cat's-paw; impress design on" .)