Top fur/hair — a pictograph of a tuft of animal hair. Here mildly contracted to 3 strokes (standalone
毛 has 4); the bottom hook gets absorbed into the
衣 below. Carries the literal etymology:
表 originally pictured fur on the OUTSIDE of clothing — the hide-side of a fur garment, which is what shows on the surface. Hence every modern sense of
表: outside, surface, show, express, watch-face.