A tie fastener is a device used to secure a necktie in place. It is also known as a tie CLIP, which is a four-letter word that can be used to solve the crossword puzzle. Tie clips are usually made of metal and come in various shapes and sizes. They are designed to hold the tie in place while allowing the wearer to move freely. Tie clips are a popular accessory for formal occasions and can add a touch of style to an outfit.