3d. Footwear leaders slip off
7d. England fans help goals in somehow
10d. A horse and sheep mix-up (7) A??????
11a. Picture not quite in front of girls in a state (7)
11d. Some dim men seemed great (7)
12a. Yemen made somebody hostile (poss 9)
21a. Ruins on the far side of filth swamp (poss 9)