Possible Clues:

• French pontoon
• Pontoon
• Vetting, at sea, a French pontoon
• Pontoon, or blackjack
• Drink abroad and get out lots of drink for game
• Get drunk splitting French wine cask — I'm game!
• Game for five or ten, tug in and out
• Blackjack
• Game for better wine, drunkenly get barrel
• A number of the French gamble