Comic book crimefighter, officer's personal assistant (6)

I believe the answer is:

batman

I believe this clue is a double definition.

'comic book crimefighter' is the first definition.
(Batman is a superhero)

'officer's personal assistant' is the second definition.
(assistant to a military officer)

(Other definitions for batman that I've seen before include "Officer's servant; the Caped Crusader" , "Comic superhero" , "Military servant" , "'British military orderly, with Robin as a sidekick? (6)'" , "Officer's personal servant" .)

I've seen this clue in The Telegraph.

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