The most common and most likely answer to this crossword clue is the 13 letter word PASSE-PARTOUT
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Buddy explains!
The straight part
We know that "Framed photograph" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case framed photograph = passe-partout.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.
What does PASSE-PARTOUT mean?
PASSE-PARTOUT noun- That by which one can pass anywhere; a safe-conduct.
- A master key.
- A light picture frame or mat of cardboard, wood, etc., usually put between the picture and the glass, and sometimes serving for several pictures.