Possible Clues:

• Part of a brain or a 59-Down
• One of a cerebral quartet
• Ear piece used by globetrotters
• Ear stretching spot
• Hoop or stud site
• Ear section grabbed by Zillo Beast
• Part of maple and sycamore leaves
• Part of an oak leaf
• Part of the cerebrum
• Any of a trio in the cerebellum