Correct flow returns (4)
I believe the answer is:
edit
'correct' is the definition.
(edit can mean to correct or emend)
'flow returns' is the wordplay.
'flow' becomes 'tide' (tiding is a kind of flowing).
'returns' shows that the letters should be reversed in order.
'tide' backwards is 'EDIT'.
(Other definitions for edit that I've seen before include "Emend" , "Check text for publication" , "Manage a newspaper" , "Rewrite" , "Revise - expurgate" .)