Related Clues:

• Fastener — principal
• Principal way to core fruit
• Paper-clip alternative
• Holds the paper together with broken plates
• Main way to keep leaves from getting scattered
• Bread, for one, keeps things together?
• Fasten together, as papers
• Ammunition for a certain gun
• Essential commodity
• Fastener in the corner
• One securing hasp; principal
• The old may be without parking, though it's essential
• Important; paper fastener
• Main, important
• Chief no longer performing well keeps power