10a In which there's plenty of room for competition? (5,4) ??A?E/????
3d Domineering lad goes round shop (5) B???Y (Bully? don't see how it fits the clue)
8d Instructions on fresh vice in the headlines? (4,2,5) ???S/?N?/?R?EN
17d Cut out 100 with the majority extreme (6) ?T?O?T