Possible Clues:

• Judge arrives having snatched quick meal
• Someone with the power to settle the matter
• Settler of a dispute
• Judge a head on real ale sound
• Go-between
• Judge of cooked rarebit
• Ump or ref
• Judge shows an aggressive dog, accepting second in Crufts
• Ref, a right angry dog, say?
• One has the authority to settle disputes