Related Clues:

• Acted the usher
• Was in charge
• Enjoyed front-runner status
• Acted as a guide
• Had charge of
• Was first in line
• Headed the parade, e.g.
• Was a trailblazer
• Did a tour guide's job
• Was in first place
• Electronic display, abbr.
• Was on top
• Crystal diode
• Was a front-runner
• Navigated