The term TEAR GAS TARGET is composed of two words: tear gas and target. Tear gas is a chemical weapon that causes irritation to the eyes, skin, and lungs, and is used to disperse crowds or control riots. A target is an object or person that is the focus of an attack or action. In this case, the crossword solution RIOTER (6 letters) refers to a person who is the target of tear gas, typically during a riot or protest.