Preview film about storyteller close to Marxist revolutionary (7)
I believe the answer is:
trailer
'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" .)