The most common and most likely answer to this crossword clue is the 9 letter word GUILLOCHE
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result GUILLOCHE
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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 GUILLOCHE mean?
GUILLOCHE noun- A fine engraved pattern of spirals, intertwining bands, etc.
- The tool used to create such work.
- To decorate with intersecting curved lines.