Went back to Rick in grass (8)
I believe the answer is:
returned
'went back to' is the definition.
('return' can be a synonym of 'go back to')
'rick in grass' is the wordplay.
'rick' becomes 'turn' ('turn' can be a synonym of 'rick').
'in' indicates putting letters inside.
'grass' becomes 'reed' (I've seen this before).
'turn' put within 'reed' is 'RETURNED'.
(Other definitions for returned that I've seen before include "Went, came or gave back" , "Honoured by the electorate" , "Came back - voted in" , "Sent back" , "Went, came or brought back" .)