The most common and most likely answer to this crossword clue is the 4 letter word HORA
H
O
R
A
More clues leading to the result HORA
Buddy explains!

The straight part
We know that "Dance music" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dance music = hora.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 HORA mean?
HORA noun- A circle dance popular in the Balkans, Israel and Yiddish culture worldwide.
- A branch of traditional Indian astrology, dealing with the finer points of predictive methods.