Engrave with acid (4)

I believe the answer is:

etch

'engrave with acid' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for etch that I've seen before include "Make carvings" , "Cut; engrave" , "Engrave (metal, glass etc.)" , "Design on metal or glass using acid" , "Wear away by chemical reaction" .)

I've seen this clue in The Star Tribune, the Newsday, The Guardian, The Sun, the Universal and The 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.