Three left. 17a A city state being overtaken (5) T???O Is it Tokyo? If so, why?
18d Playing a fool king opens drink (5) ??A?S.
21d Someone young and tender with a burden. (5) L?D?N. Is it LADEN? If so, why? I can see LAD for someone young but where does the EN come from? But LADEN seems to fit "with a burden".