The term 'Vegas Aces' is a reference to the city of Las Vegas, Nevada, which is often referred to as 'Sin City' due to its reputation for gambling and nightlife. The three-letter acronym for Las Vegas is LAS, which is the solution to the crossword puzzle. The term 'Vegas Aces' is a play on words, referring to the high stakes gambling that takes place in Las Vegas, as well as the fact that the city is known for its many casinos and poker rooms.