Related Clues:

• Be in first place
• Pb, in chemistry
• Take charge of
• What U-238 ultimately becomes
• X-ray vision thwarter
• X-ray vision blocker
• Tell others how to act
• Be in command
• Clue for Kojak
• Coveted role
• Take first steps?
• Be the bellwether
• Lacking a stopover, as a flight
• Face-to-face
• Star's role