The crossword solution for the term 'JUST A NUMBER, IT'S SAID' is AGE, which is a three letter word. AGE is a numerical measure of how long something has existed or how long a person has lived. It is often used to refer to the length of time someone has been alive, but it can also be used to refer to the amount of time something has existed. AGE is an important factor in many aspects of life, such as determining eligibility for certain activities or services.