Related Clues:

• Ref's diamond counterpart
• You could be safe with him
• Dispute settler
• Guy who cries foul
• He may call a strike
• One who's up
• His chest is protected at home
• Diamond worker?
• One who may be found at home
• He keeps a clean plate
• Ref's cohort
• Diamond expert
• Arbitrator
• Field worker
• Game caller