Solution

CRITICAL

2 clues

Crucial

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Medium
Sources: Boatload Puzzles

Other solutions to Crucial

Essential

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Medium
Sources: Boatload Puzzles

Other solutions to Essential

Words are categorized by artificial intelligence: there can be mistakes.