Ultra conservative (6)

I believe the answer is:

square

(Other definitions for square that I've seen before include "Eg, 4, 49 or 121" , "Chess board unit" , "Old-fashioned person" , "Rectangle with equal sides" , "at right angles to > wicket" .)

I've seen this clue in the Sydney Morning Herald.

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.