So cops are upset by stories (6)
I believe the answer is:
scoops
'stories' is the definition.
(scoop is a kind of story)
'so cops are upset' is the wordplay.
'are upset' is an anagram indicator.
'so'+'cops'='socops'
'socops' is an anagram of 'SCOOPS'.
'by' acts as a link.
(Other definitions for scoops that I've seen before include "First news discoveries - journalists seek them" , "News items published by paper before others" , "Exclusive news stories" , "'Stories obtained, by a newspaper say, before others (6)'" , "Shovel-like utensils" .)