Crossword Genius

One who acts mindlessly and by routine (9)

Ross

I believe the answer is:

automaton

(Other definitions for automaton that I've seen before include "Robotic figure" , "being worked invariably" , "One doesn't think" , "Zombie" , "variety of android" .)

I've seen this clue in the Sydney Morning Herald.
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.