Possible Clues:

• It's partly true, with gin I have an affaire
• Plot in underhand way
• A conspiracy or an affair
• Fascinate; conspire
• That's how I grunt - i.e., for the plot
• Old secret love affair - rueing it badly
• Make curious; secret affair
• That's the sort of true gin I get from the plot
• An underhand plot or conspiracy
• Secret scheme or conspiracy