The term OPEC IS ONE is a reference to the Organization of the Petroleum Exporting Countries (OPEC), which is an intergovernmental organization of 14 nations that was founded in 1960. The purpose of OPEC is to coordinate and unify the petroleum policies of its member countries, and to ensure the stabilization of oil markets in order to secure an efficient, economic, and regular supply of petroleum to consumers. The crossword solution for this term is CARTEL, which is an organized group of individuals or businesses that work together to limit competition and control prices in a particular market.