The most common and most likely answer to this crossword clue is the 9 plus 4 letter word EIGHTSOME REEL
I've seen this crossword clue in The Times
E
I
G
H
T
S
O
M
E
R
E
E
L
More clues leading to the result EIGHTSOME REEL
- Dance crew walk unsteadily after a few
- Steps taken in Scotland as corrupt regime shot slippery character
- 3 Mother I see with leg misplaced in dance
- Dance numbers by REM and ELO, playing around Spain
- One’s included in e.g. the Melrose dancing?
- A dance could make a number, not all, feel giddy
- A few in their glee dancing a Scottish dance
- Number, few swirl in dance
- Dance number — a few rock
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 = eightsome reel.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.