The term 'Banks of Chicago' refers to the many financial institutions located in the city of Chicago, Illinois. The most notable of these is the Federal Reserve Bank of Chicago, which is the seventh of twelve regional banks in the Federal Reserve System. Other prominent banks in the city include JPMorgan Chase, Bank of America, and Northern Trust. The crossword solution for this term is 'Ernie, ' which is a reference to Ernie Banks, a Hall of Fame baseball player who played for the Chicago Cubs from 1953 to 1971.