Battery fluid (4)

I believe the answer is:

acid

'battery fluid' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for acid that I've seen before include "Polluted precipitation" , "Etcher's fluid" , "Sour-tasting" , "Corrosive liquid; drug" , "Bitter or sour" .)

I've seen this clue in the King Feature Syndicate, the USA Today, the Penny Press, The Sun and the LA 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.