Stuff from a bog (4)

I believe the answer is:

peat

(Other definitions for peat that I've seen before include "Vegetable matter in bogs, like turf" , "Fuel dug from bog" , "Partly carbonised vegetable matter, turf" , "Organic fuel" , "Vegetable deposit used as fuel and fertiliser" .)

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.