Left savages corrupt US city (3,5)
I believe the answer is:
las vegas
'us city' is the definition.
(I've seen this before)
'left savages corrupt' is the wordplay.
'left' becomes 'l' (common abbreviation).
'corrupt' indicates anagramming the letters.
'savages' is an anagram of 'asvegas'.
'l'+'asvegas'='LAS VEGAS'
(Other definitions for las vegas that I've seen before include "Nevada gambling centre" , "Gambling capital of the world?" , "Gambling city in Nevada, USA" , "US gambling city" , "US gambling centre" .)