8: Orchestra that plays light classical music
16: Falls, as into a chair
17: Chemical group derived from benzene
20: 'The Catcher in the ___'
43: 'Two __ for Sister Sara'
45: Take an evening course?
48: Tip for a casino dealer
54: Reaction to a hotfoot, perhaps
68: Reputation in society
70: Really hard on the eyes
73: Undeliverable letter, to a postal worker
74: Sled dogs, as a group