The term 'dress-tight fitting' can be summarized by the crossword solution 'SHEATH, ' which is a 6-letter word. A SHEATH dress is a type of dress that is designed to fit tightly around the body, usually with a straight or slightly tapered skirt. It is often made from a stretchy material such as jersey or spandex, and is often worn for formal occasions. SHEATH dresses are also popular for everyday wear, as they provide a flattering silhouette and can be dressed up or down depending on the occasion.