Start legal proceedings (3)

I believe the answer is:

sue

(Other definitions for sue that I've seen before include "Little Susan" , "Make a case against" , "Take legal action against (someone), girl's name" , "Take proceedings against (a person)" , "Humbly request" .)

I've seen this clue in The Sun and The Guardian.

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.