Possible Clues:

• Line up for a thrilling walk
• Line up for balancing act
• It's for strolling along the strands
• Metaphor for a precarious course
• Precarious situation, metaphorically
• Cable on which acrobatics are performed
• Drunken painter, say, in highly dangerous position
• Guy's following drunken and perilous route
• Eastwood film, hardly profitable one made by Hitchcock
• High wire acrobats balance on