City Garibaldi started to rebuild (4)
I believe the answer is:
riga
'city' is the definition.
(Riga is an example)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for riga that I've seen before include "European capital" , "capital in Europe" , "Latvian capital" , "A rig in Latvia" , "trading centre in Latvia" .)