Preview film about storyteller close to Marxist revolutionary (7)

I believe the answer is:

trailer

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

'preview film' is the definition.
'trailer' can be an answer for 'preview' (I've seen this before). I also know that 'film' relates to this answer.

'about storyteller close to marxist revolutionary' is the wordplay.
'close to' indicates one should take the final letters (the close/ending of).
'marxist revolutionary' becomes 'ailer' (I am not sure about this - if you are sure you should believe this answer much more).
The final letters of 'about storyteller' are 'tr'.
'tr'+'ailer'='TRAILER'

Can you help me to learn more?

(Other definitions for trailer that I've seen before include "One comes before the big film" , "One's dogged" , "Advertisement for a TV programme" , "ground plant" , "It can be towed or be seen in a cinema" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.