This page lists every known solution for the clue “Energy Source” in Crossword Challenge. Because this clue can appear in different puzzles (levels) with different required answers, we first list all the answers, then show which one appears in each puzzle below.
Energy Source Crossword Challenge Answers (All Variants)
FuelOR : OilOR : Power
If more than one answer is listed, open your puzzle page below to confirm the one used there.
All Known Answers for Energy Source Clue
Puzzle 131 —
Puzzle 165 —
Puzzle 376 —
Puzzle 508 —
Puzzle 612 —
Puzzle 643 —
Puzzle 851 —
Puzzle 881 —
Puzzle 978 —
Puzzle 1189 —
Where This Clue Appears
Last Checked: December 28, 2025