Fair ___ (copyright doctrine)

USE

Legal principle allowing limited use of copyrighted material without permission for purposes like criticism or education.

This clue hints at the legal term "fair use," which is a doctrine in copyright law allowing limited use of copyrighted material without permission. The blank suggests a short word that completes the phrase, and "use" fits perfectly as the standard term. It’s a straightforward fill-in-the-blank with no wordplay—just a direct reference to a well-known legal concept.