This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 羏 is uncertain. It visually combines 羊 (sheep) and 彡 (hair/brush strokes), but the original meaning and component relationship are unclear.
The left side is a sheep 羊, and the right side is hair or brush strokes 彡. Picture a sheep with long, flowing wool that looks like decorative brush strokes.
For ヨウ, imagine a sheep with a yo-yo tangled in its wool: yo -> ヨウ, and the sheep's wool is as messy as the yo-yo string.