Related Clues:

• Did a tour guide's job
• Was in first place
• Electronic display, abbr.
• Was on top
• Crystal diode
• Was a front-runner
• Played a heart, say
• Started the trick
• Was the head of
• Had no catching up to do
• Crystal rectifier
• Shepherded
• Was in the vanguard
• Set the tempo
• Had the edge