Possible Clues:

• Timid one
• Chicken
• Racy cadets stewed local chicken, for Tom, perhaps
• Damage and ugly decay on front teeth - presumably, this is why one is afraid to go to the dentist
• Timid person
• One who jumps over anything?
• One starting easily?
• One easily frightened
• Cry as cadet condemned coward
• One easily frightened in cars, cadet becomes frantic clipping end of lorry