17D What daredevil displays - fast speed an instant after start of sprint (8) ???H?S?? 19D Pile ohay adly set - weakness i supporting structure? (7) I????S
2D Understand my pinching girl's bottom - though this isn't this! (6) S?E?L? 3D National, say, hosting fashionable playwright! (6) R?C?N? 21D Strike allowed to blck river (6) ?E?E?E
21A 'Tec getting a refusal delivered quietly (5) P?A?O 20D Private eye's suspicion about poor actor (6) S?A??? 24A University engaged in reading though not per normal (5) U???L