1: Infection leads from partly uncooked steak (3)
3: Run around near a stadium (5)
6: Reportedly is nostalgic for wife (3)
7: Bird and man going different ways (9)
8: Neil lost a letter and ended up with nothing (3)
9: Fiber extracted from thistles (5)
11: Belated top-and-tailing to gladden one's heart (5)
12: Nothing we have to pay (3)