2: Plots get Cuban revolutionary leader in a terrible mess (7)
5: Perfect counter-spy equipment (3)
7: Goes bad and accepts never-ending abuses of the system (5)
9: Town's rail transport, not express? (9)
10: Vapour trapped in paste amethyst (5)
11: Drongo lacks even a pet (3)
12: Skill is extremely tangible for a performer (7)