Crossword Genius

Arrangement in columns (10)

Ross

I believe the answer is:

tabulation

(Another definition for tabulation that I've seen is " Putting into columns".)

I've seen this clue in The Sunday Times and The 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.