Possible Clues:

• Not reserved
• ... O-P-E-N
• Frank reveals personal facts about writer without permission
• Forthright Open University man accepting special post
• Blunt stunned -- small fine in prison!
• Frank has wrong number around radius
• Forthright, frank
• “My wife is ____, but by whom?” (Sam Levenson)
• Frank reveals information on Pikachu, say, when doctor leaves
• Frank converts soup token