Callous crime ransacked bar (9)
I believe the answer is:
merciless
'callous' is the definition.
(thesaurus)
'crime ransacked bar' is the wordplay.
'ransacked' indicates an anagram.
'bar' becomes 'less' (both can mean 'not including').
'crime' anagrammed gives 'merci'.
'merci'+'less'='MERCILESS'
(Other definitions for merciless that I've seen before include "Uncharitable" , "Showing no compassion" , "Ruthless" , "Cruel" , "Totally unforgiving" .)