Dance to the song of a bee in busy bar (6)

I believe the answer is:

rhumba

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'dance' is the definition.
(I know that rhumba is a more specific form of the action dance)

'bee in busy bar' is the wordplay.
'bee' becomes 'hum' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'busy' is an anagram indicator.
'bar' is an anagram of 'rba'.
'hum' going within 'rba' is 'RHUMBA'.

'to the song of a' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Another definition for rhumba that I've seen is " Latin dance (alt sp)".)

I've seen this clue in the Sydney Morning Herald.

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