Substance used to combat heartburn (7)

I believe the answer is:

antacid

(Other definitions for antacid that I've seen before include "Indigestion cure" , "Indigestion remedy" , "remedy for tummy trouble?" , "Medicine counteracting gastric juices" , "Substance used to treat stomach upsert" .)

I've seen this clue in The Sun.

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.