An editor out of control should be restricted (8)
I believe the answer is:
rationed
'restricted' is the definition.
(rationing is a kind of restricting)
'an editor out of control' is the wordplay.
'out of control' is an anagram indicator.
'an'+'editor'='aneditor'
'aneditor' anagrammed gives 'RATIONED'.
'should be' acts as a link.
(Other definitions for rationed that I've seen before include "Apportioned out" , "Allowed fixed quantity only as in times of scarcity" , "Doled out in Rodentia" , "Restricted a scarce commodity" , "Limited (a supply)" .)