Essential Item, Not a Luxury
This page is the CodyCross answer for the clue below from Underground Worlds, Group 2177, Puzzle 1 (Niagara Falls Tunnels).
Question is: Essential Item, Not a Luxury
and the answer is: NECESSITY
Word Meaning:
NECESSITY — The quality or state of being necessary, unavoidable, or absolutely requisite.
Definitions from Wiktionary.