Possible Clues:

• Part of the body's endocrine system
• Secretory organ
• Thyroid or thymus
• It’ll make you sweat
• Pituitary or thyroid organ
• Prostate, e.g
• Pituitary, e.g
• Delighted to take in Jehan’s last for organ
• Something that's secretive
• Pituitary or thyroid