Crossword Genius

Number of singers in a quartet (4)

Ross

I believe the answer is:

four

(Other definitions for four that I've seen before include "Number of players in a doubles game" , "boat crew" , "Boundary hit (cricket)" , "Rowing boat; number" , "Cardinal" .)

I've seen this clue in the Newsday.
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.