The most common and most likely answer to this crossword clue is the 10 letter word CARTOUCHES
I've seen this crossword clue in The Guardian
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More clues leading to the result CARTOUCHES
Buddy explains!

The straight part
We know that "Decorative scrollwork" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case decorative scrollwork = cartouches.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 CARTOUCHES mean?
CARTOUCHES noun- An ornamental figure, often on an oval shield.
- (Egyptian hieroglyphs) An oval figure containing the characters of an important personal name, such as that of royal or divine people.
- A paper cartridge.
- A wooden case filled with balls, to be shot from a cannon.
- A gunner's bag for ammunition.
- A military pass for a soldier on furlough.