1: Recreating the past, USS Enterprise finally turned up (9)
2: A mongrel on a mountain takes care of things. (7)
3: Monarch met monarch in even open space for coin-operated machines (7,6)
4: In a pickle about where one should apply the acne cream (2,3,4)
5: Fools the Proletariat after banning Marx's _Capital_ (5)
7: Oddballs go right to Kansas (5)
9: Holder of strange ritual of troll (5,8)
15: Concerning story can be made good (9)
16: It causes a crash for one who owns a lot? (9)
17: Nothing we have to pay (3)
19: Senator mentioned housing trouble (7)
20: Subject to constant cold (5)
21: Romero races around (5)
23: Cronkite, Bradley, and Safer's first network (3)