I aid Elton! A problem being theoretical? (10)

I believe the answer is:

ideational

'theoretical?' is the definition.
(thesaurus)

'i aid elton a problem' is the wordplay.
'problem' indicates anagramming the letters.
'aid'+'elton'+'a'='aideltona'
'aideltona' with letters rearranged gives 'deational'.
'i'+'deational'='IDEATIONAL'

'being' is the link.

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

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