The crossword solutions for the term MELLOW, MAYBE are AGE, which is a three letter word. AGE is a noun that refers to the length of time that someone or something has existed. It is often used to refer to the amount of time that a person has been alive, but it can also refer to the amount of time that something has been in existence. In terms of MELLOW, MAYBE, AGE could be used to refer to the amount of time that something has been around, and how it has changed over time.