The term CLEAN A SURFACE can be completed in the crossword puzzle with the solution WIPE, which is a four letter word. Wiping is a common cleaning technique used to remove dirt, dust, and other debris from a surface. It is usually done with a cloth or paper towel, but can also be done with a mop or sponge. Wiping is an effective way to clean a surface because it removes dirt and grime without leaving behind any residue.