The term 'SEWN BORDER' refers to a type of stitching used to create a finished edge on a fabric. The crossword solution for this term is 'HEM', which is a type of sewing technique used to create a neat and secure edge on a garment or other fabric item. It involves folding the fabric over and then stitching it in place. This technique is often used to create a decorative border on clothing, curtains, and other items.