1: Imported food injected with nitrogen (5)
2: Follow south for lecture (5)
3: Nice work - point out the beginning (9)
4: Sister gets nothing, we hear (3)
5: Cronkite, Bradley, and Safer's first network (3)
8: Black-out unhinged LuAnn (5)
9: Demand payment? Just so! (5)
10: One politician's a brat (3)
11: It comes to a point everyone heard (3)