By no means basic (6)

I believe the answer is:

acidic

(Other definitions for acidic that I've seen before include "Tart, sour" , "Sharp-tasting, sour" , "Sour; bitter" , "Sarcastic or sour" , "Unpleasant" .)

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.