衮

The wrapping garment radical (Kangxi #145) - split here so that 公 nests inside it. Strokes 0-1 are the collar above; strokes 6-9 are the lapels and skirt below. Same V-collar pictograph that heads 装, 裳, 袋, 表 (and as 衤 in 被, 裙). Places 衮 unambiguously in the clothing family and makes the dragon-robe meaning literal: a kind of imperial garment.

Inner component nested inside the 衣 wrapper, supplying the sound (gōng → gǔn, a regular tone-and-final shift inside the same labial-velar family). Carries a quiet semantic echo too: the robe was worn by the emperor and the 三公 (Three Dukes), so a ‘ducal/public garment’ is a passable mnemonic gloss. Same phonetic-and-semantic doubling appears in 滚 (roll) and 衮’s variant 袞.