Goes behind on yields (7)
I believe the answer is:
returns
'yields' is the definition.
('return' can be a synonym of 'yield')
'goes behind on' is the wordplay.
'goes' becomes 'turns' (turning is a kind of going**).
'behind' says to put letters next to each other.
'on' becomes 're' ('on' can be mean 'with reference to').
'turns' put after 're' is 'RETURNS'.
(Other definitions for returns that I've seen before include "Goods sent back" , "Sends back" , "profit" , "Hands back" , "Goes or comes back" .)