Air Supply is an Australian soft rock duo, consisting of singer-songwriter and guitarist Graham Russell and lead vocalist Russell Hitchcock. The band had a succession of hits worldwide, including the 1980 single 'Lost in Love', which reached number one in the United States. The crossword solution for the term Air Supply is OZONE, which is a form of oxygen that is found in the Earth's atmosphere. OZONE is important for protecting the planet from the sun's ultraviolet radiation.