Neaten (up) is a term used to describe the process of making something look more attractive or presentable. The crossword solutions for this term are SPIFF (5 letters), TIDY (4 letters), SPRUCE (6 letters), and PRETTIFY (8 letters). SPIFF means to make something look more attractive, TIDY means to put things in order, SPRUCE means to make something look more attractive by cleaning it up, and PRETTIFY means to make something look more attractive by decorating it. All of these words can be used to describe the process of neatening (up) something.