Order of letters in the dictionary (5)

I believe the answer is:

edict

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'order of letters' is the definition.
'edict' can be an answer for 'order' (synonyms). I am unsure of the 'of letters' bit.

'in the dictionary' is the wordplay.
'in' indicates a hidden word.
'EDICT' can be found hidden inside 'the dictionary'.

Can you help me to learn more?

(Other definitions for edict that I've seen before include "Decree by authority" , "Authoritative ruling" , "Formal announcement" , "Order issued by an authority" , "Legally binding command" .)

I've seen this clue in The Globe and Mail.

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