Put money into in hopes of a return (6)
I believe the answer is:
invest
'put money into in hopes of a return' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for invest that I've seen before include "Put money into in hopes of a return" , "Buy shares; besiege" , "Put money or effort into" , "Lay out in expectation of profit" , "Play the market" .)