Captain check about order? (5)

I believe the answer is:

edict

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'order?' is the definition.
(I know that order can be written as edict)

'captain check about' is the wordplay.
'captain' becomes 'c' (this could be a standard abbreviation which I don't know about).
'check' becomes 'edit' (edit can mean to check or emend).
'about' indicates putting letters inside.
'c' placed into 'edit' is 'EDICT'.

Can you help me to learn more?

(Other definitions for edict that I've seen before include "Authoritative decree" , "Decree, order" , "Regulation" , "Injunction" , "Pronouncement" .)

I've seen this clue in the Sydney Morning Herald.

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