Solution

SLOGGING

4 clues

Plodding

Word class: Verb
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles

Other solutions to Plodding

Toiling

Word class: Verb
Nature of clue: Synonym
Difficulty: Easy
Sources: Boatload Puzzles

Other solutions to Toiling

LABORING

Trudging

Word class: Verb
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles

Working hard

Word class: Verb
Nature of clue: Description
Difficulty: Very easy
Sources: Boatload Puzzles

Other solutions to Working hard

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