"__ are you talking about?" (4)

I believe the answer is:

what

(Other definitions for what that I've seen before include "Which thing?" , "Interrogatory word" , "I didn't hear" , "I beg your pardon" , "That which - come again!" .)

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.