Related Clues:

• Intellectually bright, left university to join police
• Shining helmet worn by copper travelling west
• Clear or bright
• Oddly, loud child is coherent
• Coherent, articulate
• Transparently clear
• Showing up, two coppers left sober
• Clear-headed Law Lord covering a group of islands
• Vivid, like in a dream
• Convincing leading cameraman to shoot The Third Man
• In conversation relaxed aspect of personality is transparent
• Easy to understand top copper turning up inside
• Convincing over information produced in court
• Rational copper sent back in helmet
• Bright university student returned with detectives