Disrupted most of literary film preview (7)
I believe the answer is:
trailer
'film preview' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for trailer that I've seen before include "Movie promotion" , "Short scenes from a coming film" , "one's dragged behind" , "Advert; one behind car" , "Forthcoming-attraction ad" .)