Just

MERE

Nothing more than what’s needed—this word means barely or only in a simple sense.

"Just" here isn’t about fairness—it’s a synonym for "mere," meaning only or nothing more than. The clue plays on the word’s double meaning, where "just" can imply simplicity or minimal amount, much like "mere" does in phrases like "a mere drop in the bucket." Think of it as stripping away extra meaning to leave the bare, straightforward definition.