The term 'Roulette Spinner' is a reference to the spinning WHEEL used in the game of roulette. The WHEEL is divided into numbered slots, and a small ball is spun around the WHEEL until it eventually lands in one of the slots. The slot that the ball lands in determines the outcome of the game. The crossword solution for this term is 'WHEEL, ' which is an appropriate description of the spinning WHEEL used in roulette.