Law and order (5)
I believe the answer is:
edict
This clue is a double definition.
'law' is the first definition.
(I've seen this before)
'order' is the second definition.
(I know that order can be written as edict)
'and' is the link.
(Other definitions for edict that I've seen before include "Legally binding proclamation" , "An official command" , "Legally-binding order" , "Legally binding command" , "Proclamation, law" .)