The term 'LONGTIME NAME IN BANKING' can be summarized by the crossword solution 'MELLON' (6 letters). Mellon is a name that has been associated with banking for a long time. It is the name of the Mellon Financial Corporation, which was founded in Pittsburgh in 1869 and is now part of Bank of New York Mellon. The company has a long history of providing financial services to individuals, businesses, and institutions.