To argue about crime (7)
I believe the answer is:
outrage
'crime' is the definition.
(thesaurus)
'to argue about' is the wordplay.
'about' indicates an anagram.
'to'+'argue'='toargue'
'toargue' with letters rearranged gives 'OUTRAGE'.
(Other definitions for outrage that I've seen before include "Act that shocks public opinion, generates anger" , "abuse" , "Extreme indignation" , "Our gate (anag.)" , "Gross affront to decency" .)