Necktie: Use an "H" handshape to show how a tie hangs from your neck.
Note: Some people also use this sign (in context) to mean "tuxedo."
If you mean "tie" and in the contest was a tie or that the result was equal, then use the sign for "EQUAL"
If you mean "tie a knot" then just mime the tying of whatever type of knot to which you are referring.
American Sign Language University ™ ASL resources by Lifeprint.com © Dr. William Vicars