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Disciplines studied by dancing star? (10,4)

Ross

I believe the answer is:

performing arts

I'm a little stuck... Click here to teach me more about this clue!

'disciplines' is the definition.
Both the answer and definition are plural nouns.
Maybe there's an association between them I don't understand?

'studied by dancing star?' is the wordplay.
I cannot really understand how this works, but
'by' could be 'per' (I've seen this in another clue) and 'per' is present in the answer.
'star?' could be 'form' (star is a kind of form) and 'form' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for performing arts that I've seen before include "Stage and screen" , "field of activity?" , "Music and drama" , "the field of dancers and musicians" , "stage shows, say" .)

I've seen this clue in The Telegraph.
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