Shoelace snarl (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">shoelace snarl</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 knot that I've seen before include "that's sometimes in wood" , "Small northern sandpiper" , "See 2" , "Tie; group" , "Tie; sandpiper" .)