Solution

REALM

3 clues

Domain

Word class: Common noun
Nature of clue: Synonym
Difficulty: Easy

Other solutions to Domain

Kingdom

Word class: Common noun
Nature of clue: Synonym
Difficulty: Very easy
Topics: History, Politics

Royal domain

Word class: Common noun
Nature of clue: Description
Difficulty: Easy
Topics: History, Politics

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