Related Clues:

• Generational divide
• Gender problem?
• Old Navy alternative
• Job for an orthodontist
• Popular clothing chain
• Space between the teeth, e.g.
• Cleft
• Obstacle in father-son relations
• Rift
• Canyon, e.g.
• Disconnection
• Unfilled space
• Dental problem calling for braces
• Inner space
• Cumberland, for one