Related Clues:

• Part of a box
• Falling-off point
• Part of a blade
• Polygon part
• Rugged peak
• Make sharper
• Defeat by a hair
• Good thing to have in competition
• Aerie area
• ''Postcards From The ___''
• Perch for an ibex
• Borderline
• Jagged rock
• Rim … or trim
• Projecting mass of rock