The most common and most likely answer to this crossword clue is the 5 letter word HAKAS
I've seen this crossword clue in The Times
H
A
K
A
S
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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 = hakas.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 HAKAS mean?
HAKAS noun- A group dance of New Zealand's Maori people featuring rhythmic chanting, vigorous facial and arm movements, and foot stamping. Traditionally a war dance, today it is also performed to welcome guests, as a mark of respect at occasions such as commemorations and funerals, as a challenge to opposing teams at sports events, and for artistic purposes.
- To perform the haka.