The most common and most likely answer to this crossword clue is the 9 letter word LETTERBOX
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Buddy explains!
The straight part
We know that "Fixture for door" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fixture for door = letterbox.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 LETTERBOX mean?
LETTERBOX noun- A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.
- A delivery point for mail, a box, compartment or slot for this purpose.
- A hidden container that holds a logbook and rubber stamp, found by following clues.
- To transfer a widescreen motion picture to home video formats while preserving the original aspect ratio, with the placing of black bars above and below the picture area.
- To hunt for letterboxes (containers with logbook and rubber stamp) by following clues.
- Transferred to home video formats while preserving the original aspect ratio, having black bars above and below the picture area.