Mark the boundary of (9)

I believe the answer is:

delineate

(Other definitions for delineate that I've seen before include "Precisely describe" , "Indicate precisely" , "Sketch" , "Trace" , "Portray precisely - teen ideal (anag)" .)

I've seen this clue in The Washington Post.

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.