20: Good, ironically, in slang
21: Heat-of-the-moment determiner
24: From the nearest star
26: Scrapes and scratches
40: Illicitly distilled liquor
48: Waited for the laughter to die down
53: Part of the evening news
63: Flood-preventing embankment
64: Ruing the run, perhaps
66: Surface-to-surface missile
68: Dorian and aeolian, for two