Complete coverage is a term used to describe a situation in which all aspects of something are covered. In this case, the crossword solution for complete coverage is 'SKIN', which is a reference to the human body and its protective layer. SKIN is the largest organ of the body and serves as a barrier against infection, injury, and other environmental factors. It also helps regulate body temperature and provides protection from ultraviolet radiation. SKIN is an important part of complete coverage, as it covers the entire body and helps keep it healthy.