The most common and most likely answer to this crossword clue is the 9 letter word RHOMBUSES
I've seen this crossword clue in Financial Times
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More clues leading to the result RHOMBUSES
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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 RHOMBUSES mean?
RHOMBUSES noun- A parallelogram having all sides of equal length.
- In early Greek religion, an instrument whirled on the end of a string similar to a bullroarer.
- Any of several flatfishes, including the brill and turbot, once considered part of the genus Rhombus, now in Scophthalmus.
- Snails, now in genus Conus or family Conidae.