The term 'It's the end of an ERA' can be solved with the three letter word 'ERA'. This phrase is often used to signify the end of a period of time, usually one that was significant or important. It is often used to mark the end of a particular ERA in history, such as the end of a war or the end of a dynasty. It can also be used to mark the end of a particular ERA in someone's life, such as the end of their childhood or the end of a relationship.