Related Clues:

• Compelling melon to be produced in court
• Well-spoken 'dirty rat' with one copper behind
• Powerful and firm fellow
• It's clear the police need a bit of luck
• Clear cover protecting caps?
• Express split into clearly distinct parts
• Well-spoken couple
• Explicit girl in Beatles' song heard with diamonds
• Powerful - convincing
• Clear as day
• Forceful - persuasive
• Clear and logical
• Forcefully convincing
• Clearly expressed
• Effective, as an argument