The most common and most likely answer to this crossword clue is the 9 letter word BARCAROLE
I've seen this crossword clue in The Times
B
A
R
C
A
R
O
L
E
More clues leading to the result BARCAROLE
- Chorus in simple boating song
- Dance having to ban girl
- Song in simple Venetian tune
- Song is simple: sing parts
- One perhaps dressed up a part for song
- Song in simple boatman’s tune
- Girl in nude has punter’s number
- Woman contributes to unadorned song
- Song in basic Italian tune
- A number of punters sing in nude
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 = barcarole.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 BARCAROLE mean?
BARCAROLE noun- A Venetian folk song traditionally sung by gondoliers, often in 6/8 or 12/8 time with alternating strong and weak beats imitating a rowing motion.
- A piece of music composed in imitation of such a song.