This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 耴 is uncertain. It combines 耳 (ear) with 乚, but the original meaning and component function are unclear.
Since the meaning is unclear, focus on the shape: an ear 耳 beside a hook 乚. Imagine an ear with a small hook hanging from it, but remember that this kanji's meaning is uncertain.
For チョウ, imagine a distinctive ear-shaped hook named Chou: Chou -> チョウ. Picture a hook named Chou dangling from an ear.