Solution

CRAM

4 clues

Jam in

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

Pack tightly

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

Study hard

Word class: Verb
Nature of clue: Use case
Difficulty: Medium
Sources: Boatload Puzzles
Topics: Skills

Stuff

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

Other solutions to Stuff

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