The crossword solutions for the term MUCH-USED are OLD (3 letters) and TRITE (5 letters). Much-used is a term that describes something that is frequently used or seen. OLD is an adjective that means having existed for a long time, while TRITE is an adjective that means lacking originality or freshness due to overuse. Therefore, much-used can be used to describe something that has been around for a long time and has become unoriginal or stale due to its frequent use.