The term ONE-ACT (SHORT DRAMA) is a type of theatrical performance that consists of a single ACT with ONE or more scenes. It usually has a shorter running time than a full-length play and is often used as an introduction to a longer work. The crossword solution for this term is ACTER, which is a five-letter word meaning 'ACTOR.' An ACTOR is someone who performs in a play or movie, typically by speaking or singing the written text.