The term 'BIT OF FILM' can be solved by the crossword solution 'FRAME', which is a five-letter word. A FRAME in film is a single still image from a movie or video, and it is the basic unit of film. Each FRAME is a photograph that captures a moment in time, and when these frames are played back in rapid succession, they create the illusion of motion. Frames are also used to create special effects, such as slow motion or fast motion.