Possible Clues:

• Nancy --, the first woman member of Parliament
• Tango composer Piazzolla
• Famed 'Titanic' casualty
• Lady ___, first woman to sit in British Parliament
• America's first millionaire
• American capitalist John Jacob
• Noted 21-Across dealer
• Political lady regularly eats at 4
• Fur giant
• Nancy __, first woman to take up a seat in parliament