SIFT OUT is a term used to describe the process of filtering out certain elements from a larger group. It is a method of separating one thing from another, usually by using a sieve or other device to separate the two. The term is often used in the context of sorting through data or information, such as when searching for specific keywords or phrases. In the context of a crossword puzzle, the term SIFT OUT can be used to describe the process of finding the correct answer to a clue.