The term 'Notions Holder' can be summarized by the crossword solution 'ETUI', which is a French word meaning a small case or box, usually used to store small items such as sewing notions. It is typically made of leather or fabric and often decorated with embroidery or other embellishments. Etuis were popular in the 18th and 19th centuries, and are still used today for storing jewelry, cosmetics, and other small items.