1: Requires five kills, or a single accurate shot. (3)
3: Zealous police action captures leader of blackmailers (5)
6: Poles in trouble with character from Greece (7)
7: Suggestions for obvious singles (9)
9: Press or key source of metal (4,3)
11: Bumps into butcher's display of tongue? (5)
12: A representative may be a scamp (3)