What a Manicurist Files is a term used to describe the filing of nails. A manicurist is a professional who specializes in the care and beautification of nails. They use a variety of tools, including files, to shape and smooth the nails. The filing of nails is an important part of the manicurist's job, as it helps to create a neat and attractive look. The answer to the crossword is NAIL, which is a four letter word.