As usual with the cryptic one, still a few I can't get:
11a. In which there's many a patient rehearsal (8) ???????E
12d. Put a name to the boy embracing the pretty girl (8) ???E?L?D
6d. Fuel to set fire to after the end of the coal! (7) L?G?I?E
13a. Poisonous growth from Pennsylvannia in America (4) U???