New deal and new idea for the city (8)
I believe the answer is:
adelaide
'the city' is the definition.
(Adelaide is an example)
'new deal and new idea' is the wordplay.
'new' is an anagram indicator.
'and' means one lot of letters go next to another.
'new' indicates an anagram.
'deal' with letters rearranged gives 'adel'.
'idea' with letters rearranged gives 'aide'.
'adel'+'aide'='ADELAIDE'
'for' acts as a link.
(Other definitions for adelaide that I've seen before include "Australian city named for William IV's queen" , "Lead aide to Oz" , "State capital of South Australia" , "port in Oz" , "Australian location" .)