Film on European saga (4)
I believe the answer is:
epic
'saga' is the definition.
(thesaurus)
'film on european' is the wordplay.
'film' becomes 'pic' (I've seen this before**).
'on' means one lot of letters go next to another.
'european' becomes 'e' (abbreviation e.g. EU).
'pic' after 'e' is 'EPIC'.
(Other definitions for epic that I've seen before include "Long literary work about great events" , "Impressively great" , "Heroic, huge" , "Long poem telling of heroic events" , "Long adventure story" .)