Crossword puzzle clue "underground pit that contains a black rock used for energy 2 wds"

Here are the possible solutions for underground pit that contains a black rock used for energy 2 wds clue

Answer
Clue
Relevancy
coalmine
Clue
Underground pit that contains a black rock used for energy: 2 wds.
Definition
a mine at which coal is dug
negativecalorie
Clue
Unit used to jokingly describe celery, since it requires more energy to eat it than it contains
Unit used regarding celery, since it requires more energy to eat it than it contains
raced
Clue
Went pit-a-pat, pit-a-pat
Definition
RACE, to compete in a contest of speed
lava
Clue
Heavy-duty hand cleaner brand that contains volcanic rock
Heavy-duty bar soap that contains volcanic rock
Definition
molten rock that issues from a volcano
modelt
Clue
Old car that was famously available in black, black ... or black
enron
Clue
Energy company known for, well, everything but providing energy

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