The most common and most likely answer to this crossword clue is the 9 letter word POLONAISE
I've seen this crossword clue in The Times
P
O
L
O
N
A
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S
E
More clues leading to the result POLONAISE
Buddy explains!

The straight part
We know that "dance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dance = polonaise.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 POLONAISE mean?
POLONAISE noun- A kind of canopy bed draped with a baldacchin.
- A stately Polish dance in triple time and moderate tempo.
- Music for this dance.
- A woman's dress having a tight bodice and a skirt divided to show a coloured underskirt.
- A short overcoat bordered with fur.
- A garnish made with melted butter, breadcrumbs and herbs.
- To dance the polonaise.