Related Clues:

• UK national
• CIS predecessor
• Londoner, briefly
• Brezhnev's fed.
• 1984 Summer Games boycotter
• Stalin's state
• U.S. ally in WWII
• 1984 Olympics boycotter
• Cold war superpower
• 20th-c. nation
• World power until 1991
• Beatles' "Back in the ---"
• Former GDR ally
• Five-Year Plan empire
• Stalingrad's land, for short