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18a, ?c?t??, Finish off some hard stuff.
19d, ????l?r, Athlete facing obstacles ruled out in hard runs.
22a, ?o??, Accordingly you are pronounced embittered.
24a, O?e?a?t, With no attempt at concealment , devouring a cold ham.

Scotch

Hurdler

Sour

Overact

Thanks mamya, now completed.

Good stuff.