Possible Clues:

• Way in which libertine receives tango on radio
• Bus line, e.g.
• Mailman's assignment
• Map guidance
• Papers are tossed along it
• Unabbreviated version of 53-Across
• Chuck Berry and the Rolling Stones took number 66
• Way to conquer drug, initially
• Chosen way not in regular procedure
• A way to defeat enemies with energy