The crossword solution for the term 'very famous entertainer' is 'MEGASTAR, ' which is an 8-letter word. A MEGASTAR is a celebrity who is widely known and has achieved immense success in their field of entertainment. They are often considered to be the most popular and successful entertainers in the world. Megastars have achieved a level of fame and recognition that is unparalleled, and they are often seen as icons in their respective industries.