Brain's outer layer (6)

I believe the answer is:

cortex

(Other definitions for cortex that I've seen before include "Cerebral - -" , "Outer grey matter of the brain" , "Region of the brain" , "Outer layer of organ, such as the brain" , "Outer layer of the front part of the brain" .)

I've seen this clue in The 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.