Hypothetical sequence of events (8)
I believe the answer is:
scenario
'hypothetical sequence of events' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scenario that I've seen before include "Summary of plot of play" , "play's outline" , "Outlines of drama" , "Film/novel plot outline" , "Outline of dramatic work" .)