Based on the clue 'a servant of the devil shows an apprentice the art...', what is the answer?

Based on the clue 'a series of yoga exercises traditionally performed...', what is the answer? Based on the clue 'a series on these of the 30s 40s features the day...', what is the answer? 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 service line an attack line a net a ball', what is the answer? What is referred to by 'a serviette'? 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?