Damien ransacked holy city (6)
I believe the answer is:
medina
'holy city' is the definition.
(I've seen this before)
'damien ransacked' is the wordplay.
'ransacked' is an anagram indicator.
'damien' is an anagram of 'MEDINA'.
(Other definitions for medina that I've seen before include "Location of the tomb of Mohammed" , "quarter of Marrakesh?" , "holy place" , "Second most holy city of Islam, in Saudi Arabia" , "Native quarter in North African cities" .)