Rank's counterpart, on a chessboard (4)

I believe the answer is:

file

(Other definitions for file that I've seen before include "Smoothing tool; organised data" , "Folder; rasp" , "Three Dn and this can indicate ordinary people" , "Tool to hold documents" , "Cutting tool or line of people" .)

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.