A nit (anag.) (4)

I believe the answer is:

anti

(Other definitions for anti that I've seen before include "Policy's opponent" , "Opposed to followers of Hitler" , "Who pooh-poohs all" , "'No' voter" , "Person opposed" .)

I've seen this clue in 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.