Financial benefit (6)
I believe the answer is:
profit
'financial benefit' is the definition.
'profit' can be an answer for 'benefit' (I've seen this before). I also know that 'financial' relates to this answer.
This is all the clue.
(Other definitions for profit that I've seen before include "Gain from employment of capital" , "returns" , "Clean up" , "Yield - gain" , "Surplus earnings" .)