Lead character in "Stranger Things"? (3)

I believe the answer is:

ess

(Other definitions for ess that I've seen before include "Nineteenth letter" , "Letter from Mid-West" , "Alphabet letter" , "Curvaceous letter" , "top secret" .)

I've seen this clue in The New York 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.