Measuring stick (5)

I think it could be either:

ruler

gauge

'measuring stick' is the definition.
(ruler is a kind of measuring stick)

This is all the clue.

(Other definitions for ruler that I've seen before include "Person in authority" , "Straight edge; monarch" , "Person in charge of country" , "Potentate" , "Stationery item" .)

I've seen this clue in The Independent, The Telegraph, the Evening Standard, The Irish Times, The Daily Mail, the Newsday, the Universal, The Times and The Mirror.

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.