2: Hazardous emanation from river used by a crime boss (5)
3: Tom Cruise playing an outfitter (9)
4: Bend in the middle and wind back (3)
5: Part of stair is erect (5)
8: A girl in distress, sought by knights (5)
9: The sound of a piano is excruciating (5)
11: Perfect counter-spy equipment (3)