Sign up for the army (6)

I believe the answer is:

enlist

(Other definitions for enlist that I've seen before include "Enrol in the services" , "Join the armed forces" , "Register" , "Join up, sign on" , "augment army" .)

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.