Philosophical idea relating to harmony and order in the universe (3)

I believe the answer is:

tao

(Other definitions for tao that I've seen before include "Source of existence (Chinese)" , "Universal principle of Chinese philosophy" , "Chinese way to be followed" , "path of Chinese" , "Chinese philosophical principle" .)

I've seen this clue in The Guardian.

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.