Teen's spot (4)

I believe the answer is:

acne

(Other definitions for acne that I've seen before include "Face problems" , "Pimply skin condition of adolescence" , "Youthful problem" , "Skin problem, mainly of teenagers" , "Problem to face in" .)

I've seen this clue in the Penny Press.

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.