Campaign worker (4)

I think it could be either:

Which length description are you looking for?:

9 4*

'campaign worker' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for aide that I've seen before include "Personal assistant in the military" , "Leader's assistant" , "Confidential assistant or advisor" , "Officer in attendance" , "Second" .)

I've seen this clue in the USA Today and The Wall Street Journal.

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