Clue: Game to sleep with nothing on next to Trotsky? (8)
Answer: NAPOLEON
Explanation: Definition: Game
NAP + 0 + LEON – perhaps the reference to Trotsky is a nod to the the theme, as is "sleep with nothing on", from the original 4th Commandment "No animal shall sleep in a bed", later surreptitiously modified to "No animal shall sleep in a bed with sheets"