Possible Clues:

• It's swung at the U.S. Open
• Opens 14 across and 1 across for one of those serving their time with strings attached
• Piece of sports equipment with strings
• Time in 20 down winding-up most of those linked to shady business in the hands of court entertainer
• Sporting equipment (making an unpleasant noise at Wimbledon, perhaps?)
• Figure wrong over illegal activity is one taken to court
• A court entertainer will have one in the palm of his hand