Related Clues:

• Heir, at times
• Barber's call
• Next in line
• Waiting-room call
• Junior, perhaps
• Furthest along
• First-born of siblings
• One who's gonna get it?
• Call in a bakery
• Service call?
• Prince, presumably
• Junior, often
• Favorite son, maybe
• Barber's shout
• Leading the queue