Assistant's clever idea (4)

I believe the answer is:

aide

'assistant's' is the definition.
(aide is a kind of assistant)

'clever idea' is the wordplay.
'clever' is an anagram indicator.
'idea' is an anagram of 'AIDE'.

(Other definitions for aide that I've seen before include "Helper" , "Personal assistant in the military" , "Right-hand man/woman" , "One to assist" , "a help" .)

I've seen this clue in the Evening Standard.

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