Possible Clues:

• Sport involving birds
• Regularly affable leader of crew on line, working with birds
• Hunting with birds of prey
• Two different gangsters consumed by young fish and birds of prey
• Training birds of prey, disturbing a cornfly
• Hawking scam on river and railway
• Hunting with hawks
• Here's how to get the bird: do badly with study, forgetting one's lines
• Keeping of birds of prey
• Hawking