The crossword solution for the term 'LAS VEGAS GAS' is NEON. NEON is a chemical element with the symbol Ne and atomic number 10. It is a noble gas that is colorless, odorless, and tasteless. NEON is used in many applications, including advertising signs, television sets, and high-voltage indicators. It is also used in Las Vegas, where it is used to create the iconic NEON signs that are seen throughout the city.