Stuck.....again.
11A - Drive on now to the 7th! (3,3)
T _ E _ F _. (The ???)
16D - The first one must have been like purgatory, if that's an acknowledgement. (10)
C _ N _ _ _ _ _ _ _.
24D - Its that jazz man with the hat, by George! (5) _ _ _ L _.
All help appreciated....