What is referred to by 'a serviette'?

What is referred to by 'a serious a single'? Based on the clue 'a serious play about one of the 3 hindu gods', what is the answer? Based on the clue 'a servant of the devil shows an apprentice the art...', what is the answer? Based on the clue 'a service line an attack line a net a ball', what is the answer? Based on the clue 'a serving cart for desserts if youre off it youre ...', what is the answer? Based on the clue 'a serving of the butternut variety of this vegetab...', what is the answer? Based on the clue 'a serving piece that can be fancy or a fancy name ...', what is the answer? Based on the clue 'a set of buildings housing soldiers in a garrison', what is the answer?