Yellowish Liquid That Is Refined to Make Fuels
Puzzle 15 of Classic Things Medium Pack
Question is: Yellowish Liquid That Is Refined to Make Fuels
and the answer is: PETROLEUM
Word Meaning:
PETROLEUM — A flammable liquid ranging in color from clear to very dark brown and black, consisting mainly of hydrocarbons, occurring naturally in deposits under the Earth's surface.
Definitions from Wiktionary.