Cut over is a term used in the lumber industry. It refers to the process of cutting logs into boards and planks. The two crossword solutions, RESAW (5 letters) and RETRIM (6 letters), are both related to this process. RESAW is the act of sawing a board or plank into two or more thinner pieces. RETRIM is the act of trimming the edges of a board or plank to make it even. Both processes are part of the cut over process.