Aids to those researching wicked Etonian squires (14)

I believe the answer is:

questionnaires

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'aids to those researching' is the definition.
I can't tell whether this defines the answer.

'wicked etonian squires' is the wordplay.
'wicked' indicates an anagram.
'etonian'+'squires'='etoniansquires'
'etoniansquires' anagrammed gives 'QUESTIONNAIRES'.

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I've seen this clue in The Guardian.

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