Possible Clues:

• Toxin resulting in some gastric indigestion
• It's said that Chinese dish may have this poison
• Poison from castor oil seeds
• One thing kedgeree has, we hear: poison
• Castor-bean poison
• Fatty almost accepted poisonous substance
• Dangerous stuff contributing to gastric influenza
• Endlessly abundant in toxic substance
• Toxic protein prepared on 'Breaking Bad'
• Main officers circulating chemical company find bioweapon