The term ANTIDOTE TARGET is composed of four crossword solutions: TOXIN (5 letters), ESPRESSO (8 letters), SERUM (5 letters), and VIAL (4 letters). An antidote is a substance that can counteract a form of poisoning, and a target is an object or person that is the focus of an action. In this case, the antidote target is composed of four substances that are used to treat poisonings. TOXIN is a poisonous substance produced by living organisms, ESPRESSO is a type of coffee made by forcing hot water through finely ground coffee beans, SERUM is a clear liquid that separates from clotted blood and contains antibodies and other proteins, and VIAL is a small container, usually made of glass, used to store medicine.