hip-bone
髎 centers on the hip-bone, a specific anatomical term for the bony structure of the hip.
髎 combines 骨 (bone) with 翏, which likely contributes the sound. The character is a phono-semantic compound specifically coined for the hip-bone.
The left side 骨 means bone, and the right side 翏 looks like feathers (羽) over a platform. Imagine a bird's wing bone structure that resembles the shape of a human hip-bone.
For リョウ, picture a hip-bone shaped like a ryo (a traditional Japanese coin) — the round coin shape mirrors the hip socket, and 'ryo' cues リョウ.