Related Clues:

• 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
• Rugged mountain
• Avant-garde
• Mantel
• It can be the difference between winning and losing
• Sphere's lack