The most common and most likely answer to this crossword clue is the 9 letter word FANDANGOS
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Buddy explains!

The straight part
We know that "Dances" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dances = fandangos.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 FANDANGOS mean?
FANDANGOS noun- A form of lively flamenco music and dance that has many regional variations (e.g. fandango de Huelva), some of which have their own names (e.g. malagueƱa, granadina).
- A gathering for dancing; a ball.
- An unknown entity or contraption.
- (color) A shade of red-violet.