lined garment
裌 centers on a garment with an inner layer: a lined piece of clothing.
裌 combines 衤 (clothing) with 夾, which likely contributes the sound and the idea of something pressed between layers, as in a lined garment.
The clothing radical 衤 beside 夾, which looks like a person 大 with two small marks on each side, suggests a garment with an extra layer pressed inside: a lined garment.
For コウ, imagine a coat with a warm inner lining: coat -> コウ, and the lined garment keeps you cozy.