The term 'SHARP, AS A TURN' can be solved by the crossword solution 'HAIRPIN', which is a seven-letter word. A HAIRPIN is a U-shaped metal pin used to hold a person's hair in place. It is usually made of metal or plastic and has two ends that are bent together to form a loop. Hairpins have been used for centuries and were popularized in the early 20th century. They are still widely used today as a way to keep hair in place.