Solution

UNDERTAKEN

3 clues

Attempted

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

Other solutions to Attempted

Begun

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

Started

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Very easy

Other solutions to Started

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