She entertains ballerina from Warsaw (4-6)

I believe the answer is:

pole-dancer

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'she entertains' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'ballerina from warsaw' is the wordplay.
I cannot really see how this works, but
'ballerina' could be 'dancer' (I've seen this before) and 'dancer' is found in the answer.
'from' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

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

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