Pledge from a groom (3)

I believe the answer is:

ido

(Other definitions for ido that I've seen before include "See 1" , "Artificial language" , "Naturally, nobody speaks this" , "Wedding promise" , "Prepared tongue" .)

I've seen this clue in The Washington Post.

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.