Maker of red cups (4)

I believe the answer is:

solo

(Other definitions for solo that I've seen before include "Performed by a single voice or instrument" , "Card game; for one" , "Han - (Star Wars); fly unaccompanied" , "Piece of music for one" , "Unaccompanied - card game" .)

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.