The crossword solution for the term 'Smooth Operator Band' is SADE, which is a British band formed in 1982. The band is best known for their soulful and smooth sound, which has earned them multiple Grammy Awards. They are also known for their hit singles such as 'Smooth Operator' and 'No Ordinary Love'. SADE is considered one of the most successful and influential bands of the 1980s and 1990s.