Possible Clues:

• Umpire; arbitrator
• Sports adjudicator
• Official who ensure fair play
• Make some calls
• One may use hand signals
• A judge of Whistler?
• One needs such a judge if one is e'er to get free
• He should be fair, but he doesn't play the game
• Could Whistler e'er get free?
• Whistler overseeing pitched battle