"Right on!"

I think it could be either:

Which length description are you looking for?:

amen

'right on' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for amen that I've seen before include "Word of approval" , "Churchgoer's assent?" , "Response to prayer" , "Prayerful last word" , "Extremist" .)

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.