Possible Clues:

• Lawmakers dismiss smear from tramp
• Word flashing at an intersection
• One of life's professions that is covered by a postman?
• See 16
• Go free, in prison-lingo
• See 18-, 27-, 45- and 56-Across
• Rehearsal of Copperfield illusion at Great Wall of China?
• Base on balls, in baseball
• What Lou Reed will take "On the Wild Side"?
• *Runway