loop, belt or band
襻 centers on a fastening loop or strap used to secure clothing or gear: a belt, band, or tie that holds things together.
襻 combines 衤 (clothing) with 攀, which likely contributes the sound and the idea of pulling or fastening, suggesting a clothing loop or strap.
The clothing radical 衤 on the left and the complex 攀 on the right suggest a garment with a pulling loop: picture a belt loop on pants that you pull to fasten.
For ハン, imagine a hand pulling a belt loop tight: hand -> ハン, and the loop secures the clothing.