The term 'THE START OF SOMETHING' can be broken down into two crossword solutions: ESS (3 letters) and DAYONE (6 letters). ESS stands for 'Early Stage Startups', which are companies that are in the early stages of development. DAYONE is a term used to describe the beginning of something, usually referring to the first day of a project or venture. Together, these two terms represent the beginning of a new venture or project, signifying the start of something potentially great.