Bottom of some prep school uniforms (4)

I believe the answer is:

kilt

(Other definitions for kilt that I've seen before include "Highlanders garment" , "Scots dress" , "Scottish costume" , "Scots garment" , "Knee-length tartan garment" .)

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.