Helper? What a funny idea! (4)

I believe the answer is:

aide

'helper?' is the definition.
(aide is a kind of helper)

'what a funny idea' is the wordplay.
'what a funny' indicates an anagram.
'idea' anagrammed gives 'AIDE'.

(Other definitions for aide that I've seen before include "auxiliary" , "one helping" , "Political assistant" , "Military officer acting as assistant" , "Somebody helping" .)

I've seen this clue in the Evening Standard.

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