The crossword solution for the term 'Jacket Accompanier' is 'VEST'. A VEST is a sleeveless garment that is worn over a shirt or blouse. It is usually made of wool, cotton, or synthetic fabrics and can be either formal or casual. Vests are often used as part of a suit or tuxedo, but can also be worn on their own. They are popular in many countries around the world and come in a variety of styles and colors.