Possible Clues:

• Resort city in the Crimea, where Stalin, Roosevelt and Churchill conferred in February 1945
• Where Churchill, Stalin and Roosevelt met in February 1945
• Royal taproom's bottled port
• Agent on vacation was resting around Crimean resort
• Agent on vacation was resting up in Black Sea resort
• Crimea summit site of 1945
• The big three met there in 1945 and lay back with thanks
• Crimean resort and seaport
• Ukrainian resort
• Yankee lieutenant in recovery position at old conference