Sentence:  Following a 1973 White House <WSD>command performance</WSD> and a TV special, Ol' Blue Eyes Is Back, Sinatra made his first nightclub appearance in three years at Las Vegas' Caesars Palace. 
Meaning of the word marked with <WSD> tags:  A dramatic, musical, or similar entertainment performed before a monarch or other head of state, especially in a circumstance where that ruler has requested or ordered the performance.