1: Boxer Max returned, holding heroin, for treatment (5)
2: Get into the archeology scene. (3)
3: Doesn't move convict housing in a rising (9)
4: Understood I engaged in diplomacy (5)
5: Clear initial rubbish in drain (3)
8: Lived with hind-end whip mark (5)
9: Dark mysterious thing (5)
10: Choose to take the top off (3)
11: Various centres on Spanish drain (3)