Finalized (4,2)
(Other definitions for sewn up that I've seen before include "Mended completely - successfully negotiated" , "Satisfactorily completed" , "Successfully completed" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">finalized</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for set that I've seen before include "Put, coagulate" , "'Put, place or fix in position (3)'" , "See 16 Down" , "Fix in place; similar group" , "box?" .)