Related Clues:

• Very narrow boundary
• Precise fulcrum
• If one looks sharp one may be balanced there
• Hone could make this keen
• Eking out fodder stored in desperate situation
• Anchor, getting out of fine mess and into predicament
• What the chef uses in a tense situation?
• Wound fringe to a critical point
• Eking out stored fodder at critical juncture
• Point that's critical about, say, writing material to limit what's eaten
• It could be ground where games are finely balanced
• Critical position - blade
• Tense (and likely to be cut!)
• It's often cutting
• Poised to go either way