Open, as shoelaces (4)
I believe the answer is:
undo
'open as shoelaces' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for undo that I've seen before include "Open buttons or ruin" , "Subvert" , "Loosen; cancel" , "Cancel, annul; open" , "set free" .)