Mixture of Substances Used to Fire Guns
This page is the CodyCross answer for the clue below from Farm, Group 467, Puzzle 4 (Subsistence Farming).
Question is: Mixture of Substances Used to Fire Guns
and the answer is: GUNPOWDER
Word Meaning:
GUNPOWDER — An explosive mixture of saltpetre (potassium nitrate), charcoal and sulfur; formerly used in gunnery but now mostly used in fireworks.
Definitions from Wiktionary.