The term 'FLASH GORDON, E.G.' is referring to a type of SERIAL, which is a type of media that tells a story through a series of installments. The crossword solution for this term is SERIAL, which is a 6-letter word. Flash Gordon is an example of a SERIAL, as it was originally a comic strip that was published in newspapers from 1934 to 2003. It has also been adapted into several films, television shows, and video games.