The most common and most likely answer to this crossword clue is the 9 letter word FURNITURE
I've seen this crossword clue in Financial Times
F
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More clues leading to the result FURNITURE
Buddy explains!

The straight part
We know that "fittings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fittings = furniture.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 FURNITURE mean?
FURNITURE noun- Large movable item(s), usually in a room, which enhance(s) the room's characteristics, functionally or decoratively.
- The harness, trappings etc. of a horse, hawk, or other animal.
- Fittings, such as handles, of a door, coffin, or other wooden item.
- The stock and forearm of a weapon.
- The pieces of wood or metal put round pages of type to make proper margins and fill the spaces between the pages and the chase.
- Any material on the page other than the text and pictures of stories.