Free issue about upcoming film (10)
I believe the answer is:
emancipate
'free' is the definition.
(I've seen this before)
'issue about upcoming film' is the wordplay.
'issue' becomes 'emanate' (I've seen this before).
'about' is an insertion indicator.
'upcoming' says the letters should be written in reverse.
'film' becomes 'pic' (abbreviation for picture).
'pic' written backwards gives 'cip'.
'emanate' enclosing 'cip' is 'EMANCIPATE'.
(Other definitions for emancipate that I've seen before include "setting free" , "Liberate" , "Free from slavery" , "Free from restrictions" , "release" .)