What secures a necktie (4)

I believe the answer is:

knot

(Other definitions for knot that I've seen before include "Shore bird, tangle" , "Unit of speed used by ships" , "Tether" , "Hard irregularity in timber - interlacing of cord" , "Bend - one nautical mile per hour" .)

I've seen this clue in the Newsday.

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