Solution

REQUIRED

3 clues

Mandatory

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Easy
Sources: Boatload Puzzles
Topics: Law, Society

Other solutions to Mandatory

Necessary

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Society

Other solutions to Necessary

Needed

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Society

Other solutions to Needed

LACKED

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