The crossword solution for the term 'break up a plot' is HOE, which is a three-letter word. HOE is a tool used in gardening and farming to break up soil and remove weeds. It can also be used metaphorically to describe the act of breaking up a plot, which is the process of dividing a story into its component parts. This could include separating the characters, setting, and events into distinct sections. Breaking up a plot can help writers better organize their stories and make them easier to understand.