The term ONE-___ BANDIT refers to a type of slot machine, also known as a fruit machine or a poker machine. It is an automated gambling machine that pays out when the player lines up certain symbols on the reels. The term 'one-ARMED bandit' comes from the fact that the machines used to be operated by a lever on the side of the machine, which was referred to as an arm. The crossword solution for this term is 'ARMED', referring to the lever on the side of the machine.