What is the term for a clip that references a specific segment of a master clip?

The term that describes a clip referencing a specific segment of a master clip is "subclip." A subclip is effectively a way to isolate and use a particular section of a longer source, or master clip, without altering or moving the original content. Subclips maintain a link to the master clip, allowing editors to create organized timelines by pulling only the necessary segments they plan to utilize in their projects. This functionality supports efficient editing workflows, enabling quick access to frequently used portions of media.

The other terms do not accurately describe this function: "effect" generally refers to modifications or enhancements applied to clips, "motion effects" pertain specifically to animated effects on clips, and "import" is about bringing media files into an editing software environment rather than referencing specific segments within existing clips.