The term 'FIVE O'CLOCK' can be summarized as a phrase that refers to the time of day, usually in the afternoon, when the sun is beginning to set. The crossword solution for this term is 'SHADOW', which is a noun that describes the dark shape or area created by an object blocking out the light from a source such as the sun. This term is often used to refer to the time of day when the sun is setting and the shadows become longer.