An unlikely story is a narrative that is highly improbable or implausible. It is often used to describe a TALE that is exaggerated or fabricated. In crossword puzzles, the term 'unlikely story' can be represented by the words YARN, TALE, and talltale. YARN is a type of thread or fiber used for knitting or weaving, while TALE is a narrative or story. Talltale is an exaggerated or far-fetched story, often used to entertain or amuse.