Tie things up with a winner to the corner (4)
I believe the answer is:
lace
'tie' is the definition.
(lacing is a kind of tiing)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for lace that I've seen before include "Shoe string" , "Famous play ''Arsenic and Old . . . .''" , "Fine open fabric" , "Fabric made in openwork design" , "Shoe cord" .)