Malagueña Ben dancing is too demanding (12)

I believe the answer is:

unmanageable

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'too demanding' is the definition.
I can't judge whether this definition defines the answer.

'malaguena ben dancing' is the wordplay.
'dancing' indicates an anagram.
'malaguena'+'ben'='malaguenaben'
'malaguenaben' is an anagram of 'UNMANAGEABLE'.

'is' is the link.

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(Other definitions for unmanageable that I've seen before include "Impossible to control" , "Recalcitrant" , "Hard to control" .)

I've seen this clue in The Times.

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