Order found in the dictionary (5)
I believe the answer is:
edict
'order' is the definition.
(I know that order can be written as edict)
'in the dictionary' is the wordplay.
'in' says the answer is hidden in the clue.
'EDICT' is hidden within 'the dictionary'.
'found' is the link.
(Other definitions for edict that I've seen before include "Legally binding proclamation" , "Official decree" , "Injunction" , "Order issued by an authority" , "Regulation" .)