Related Clues:

• Sweat ___
• Secretive group
• Pancreas or liver
• They're secretive
• Pituitary and thyroid
• Endocrine, for one
• Source of sweat
• Secretion organ
• Liver or kidney
• Secreting organ
• Adrenal, for instance
• Pancreas and thyroid
• Producer of sweat and tears, but not blood
• Secretive group?
• Pancreas, for one