The most common and most likely answer to this crossword clue is the 5 plus 6 plus 4 letter word WHERE EAGLES DARE
I've seen this crossword clue in The Times
W
H
E
R
E
E
A
G
L
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S
D
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More clues leading to the result WHERE EAGLES DARE
Buddy explains!

The straight part
We know that "a Burton film" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a burton film = where eagles dare.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.