clip-part-event seems to be the same thing many times - usually called clip or item in other daws.
part can be a just recorded clip, or a number of clips.
Event can refer to clip as such, or a single midi controller entry like program patch select etc.
I think a cleaning up of this will avoid a lot of confusion reading manuals.
Naming I got used to or would prefer:
Midi event - single note on/offs, controllers, realtime midi, clocks etc - these are the highest resolution stuff
Midi clip - a container for a series of midi events, often from a single take recording
Midi part - a container of midi clips
Midi track - a container for midi parts
or any other way - just that it is consistent all the way through.