__ Jelly, Gelatinous Substance Used as a Lubricant
This page is the CodyCross answer for the clue below from Larger than Life, Group 2143, Puzzle 4 (Submarines).
Question is: __ Jelly, Gelatinous Substance Used as a Lubricant
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.