1: Come to Korea - Chinese part (5)
4: Three kernels of copper-yellow grain (3)
6: Plots get Cuban revolutionary leader in a terrible mess (7)
7: This is truncated, or the end's off (9)
9: Witty remark, for example, about constant batterer (7)
11: Agree to make Lucifer wicked? (3)
12: Article missing from European's sources (5)