Related Clues:

• Headed the parade, e.g.
• Was a trailblazer
• Did a tour guide's job
• Modern TV substance
• Was in first place
• Electronic display, abbr.
• Was on top
• Crystal diode
• ___-screen TV
• Was a front-runner
• Played a heart, say
• Started the trick
• Was the head of
• Had no catching up to do
• Crystal rectifier