Possible Clues:

• Jack Dempsey, "The Manassa ---"
• Ruffian
• The Manassa ___, nickname for boxer Jack Dempsey
• Jack Dempsey, "The Manassa ___"
• Dempsey, the 'Manassa '
• The Manassa ___(Jack Dempsey)
• Roughhousing one
• Jack Dempsey, aka the Manassa ___
• Dempsey, the 'Manassa --'
• Overly aggressive fighter