Protective department (5)

I believe the answer is:

legal

(Other definitions for legal that I've seen before include "Within bounds of law" , "It's acceptable" , "not banned" , "Authorised" , "Observing acts" .)

I've seen this clue in the Newsday.

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.