Possible Clues:

• Scheme for obtaining money dishonestly causes uproar
• Din of the fraudulent moneymaking activity
• Cause to call for silence in court?
• Criminal activity that's skilfully handled in court
• For the court, by the sound of it, it's not very nice, by the sound of it
• A lot of noise, or a tennis bat
• Novotna's requirement
• There's a row over its not being quite legal
• Row on the court, by the sound of it
• Booming, illegal business?