Possible Clues:

• Way around the law
• Opportunity to evade difficulty
• Means of evading a rule
• Originally, a castle-wall slit
• Means to avoid quiet little vacation in Cornish town
• A way of evading a rule or contract
• Stakes returned by sounding out all means to avoid law
• Contract oversight
• In card game with European, Henry's found a way to escape penalty
• Turn it over for swimming; that's where the water gets away