Related Clues:

• Golf unit
• Metaphor for debt
• Excavation
• Middle of a doughnut
• Golf goal
• Ace's hideout
• Deep furrow
• Swiss cheese feature
• Boring result
• Doughnut's center
• Flaw, as in a theory
• Serious flaw
• Negative space
• Moth's calling card
• Froot Loops feature