Warning about old city causing outrage (6)
I believe the answer is:
furore
'outrage' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'warning about old city' is the wordplay.
'warning' becomes 'fore' (shouted in golf).
'about' means one lot of letters goes inside another.
'old city' becomes 'ur' (ancient city state).
'fore' placed around 'ur' is 'FURORE'.
'causing' is the link.
Can you help me to learn more?
(Other definitions for furore that I've seen before include "agitation" , "Frenzy, uproar" , "Uproar, outcry" , "'Uproar, brouhaha (6)'" , "Storm" .)