Editor sadly ran amok (6)
I believe the answer is:
rioted
'ran amok' is the definition.
(I've seen this in another clue)
'editor sadly' is the wordplay.
'sadly' indicates anagramming the letters.
'editor' is an anagram of 'RIOTED'.
(Other definitions for rioted that I've seen before include "Revolted" , "Took part in violent civil disorder" , "Of mob, ran wildly through the streets" , "Brawled" , "Rampaged" .)