Old Testament city destroyed by God for its wickedness (5)
I believe the answer is:
sodom
(Other definitions for sodom that I've seen before include "Gomorrah's twin town in Palestine" , "Wicked OT city" , "Wicked depraved place" , "Wicked town of ancient Palestine, twinned with Gomorrah" , "Gomorrah's partner in evil by the Dead Sea" .)