to hunt at night by torches
獠 centers on hunting at night using torches, a specific and vivid hunting method.
獠 combines the animal radical 犭 with 尞, which likely contributes the sound and may relate to burning or torches, fitting the meaning of hunting at night by torchlight.
The animal radical 犭 beside 尞 (which resembles a torch or fire on an altar) suggests hunting animals by torchlight at night.
For リョウ, imagine a hunter named Ryo carrying a torch while hunting at night: Ryo -> リョウ, and the torch lights the way.