Crossword Genius

Disrupted most of literary film preview (7)

Ross

I believe the answer is:

trailer

I'm a little stuck... Click here to teach me more about this clue!

'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" .)

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