Help prince finally run off to find adjutant (4-2-4)

I believe the answer is:

aide-de-camp

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'adjutant' is the definition.
(synonyms)

'help prince finally run off' is the wordplay.
'help prince finally' becomes 'aide' (I can't justify this - if you can you should believe this answer much more).
'run off' becomes 'decamp' (synonyms).
'aide'+'decamp'='AIDE-DE-CAMP'

'to find' acts as a link.

Can you help me to learn more?

(Other definitions for aide-de-camp that I've seen before include "Military adviser" , "Military assistant" , "Senior officer's assistant" .)

I've seen this clue in The Telegraph.

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