The crossword solution for the term 'It's a long STORY' is 'STORY' with five letters. The phrase 'It's a long STORY' is often used to indicate that the speaker has a lot to say about a particular topic, but does not have the time or energy to go into detail. It can also be used to express frustration or exasperation when someone asks a question that requires a lengthy explanation. In either case, the phrase implies that the speaker has a lot to say, but is not willing to share it at the moment.