The term 'LACKING LUMPS' can be described as having an EVEN surface, without any bumps or irregularities. This term is often used to describe a smooth texture, such as that of a liquid or a powder. It can also be used to describe a flat surface, such as a wall or a floor. The crossword solution for this term is 'EVEN', which is a four-letter word meaning having a level surface without irregularities.