The term 'floor-cleaning implement' refers to tools used to clean floors. The two crossword solutions for this term are MOP (3 letters) and WETMOP (6 letters). A MOP is a tool consisting of a handle attached to a bundle of absorbent material, such as cotton or synthetic fibers, which is used to clean floors. A wet MOP is a MOP that has been soaked in water and cleaning solution before use. Both mops are used to clean floors by absorbing dirt and debris, and can be used with a variety of cleaning solutions.