Dark portion of a Chinese circle (3)

I believe the answer is:

yin

(Other definitions for yin that I've seen before include "Chinese female passive principle of universe" , "Yang's counterpart" , "principle accepted in China" , "Principle of cold and dark" , "Counterpart of yang" .)

I've seen this clue in the LA Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.