The term 'CAST SUPPORTERS' can be summarized as people who provide assistance to a cast of actors. The crossword solution for this term is SLINGS, which refers to the support that cast supporters provide. SLINGS are used to help actors with their costumes and props, as well as to provide physical support during performances. Cast supporters also help with set design, lighting, and sound. They are an integral part of any production, ensuring that the show runs smoothly and that the actors have the necessary resources to perform their roles.