The most common and most likely answer to this crossword clue is the 2 plus 5 plus 4 letter word LA DOLCE VITA
I've seen this crossword clue in The Daily Telegraph
L
A
D
O
L
C
E
V
I
T
A
More clues leading to the result LA DOLCE VITA
Buddy explains!
The straight part
We know that "Film" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case film = la dolce vita.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.