Symbol for death in ancient Athens (5)

I believe the answer is:

theta

(Other definitions for theta that I've seen before include "letter to Greeks" , "Letter to the Corinthians" , "Greek letter equivalent to th" , "Foreign character" , "classic character?" .)

I've seen this clue in The Wall Street Journal.

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.