Related Clues:

• Not easily angered
• Stable
• Plumb
• Fair and balanced
• Antithesis of 4-Down
• Fully avenged
• Bump-free
• On a par
• Knotted, scorewise
• All tied up
• Able to be halved equally
• Tied in score
• What one isn't?
• Unbiased
• Squared up