Possible Clues:

• The German harbouring anger may be a disputatious type
• One might argue that this might buck around a fly-by-night
• Speaker in parliament perhaps berated if stumbling
• Wrangler does without club
• One in dispute re a debt unsettled
• I argue that mammal should eat mammal
• Lincoln or Douglas
• One in dispute about a debt may hesitate
• For the sake of argument, one might buck around a fly-by-night
• One engaged in public argument