裙

Clothing radical on the left is the side-form of 衣 (which itself pictures a robe with two flaring sleeves). It indexes 裙 in the garment family with 裤 trousers, 衫 shirt, 袖 sleeve, 袋 pocket. Without it, the right side would just be a ruler - the cloth radical confirms a wearable item.

Right is 君 'lord, ruler', supplying the sound - jūn drifting to qún with regular j/q alternation. Same phonetic in 群 flock and 郡 prefecture. Clothing + ruler historically meant the formal wraparound skirt worn by both noblemen and noblewomen in early China; the modern sense narrowed to women's skirts.