Excellent Havana, for example (7)
I believe the answer is:
capital
I believe this clue is a double definition.
'excellent' is the first definition.
(thesaurus)
'havana for example' is the second definition.
(havana is a kind of capital)
(Other definitions for capital that I've seen before include "Hamilton, perhaps" , "Upper case city" , "Seed money" , "Wealth; main city" , "Fantastic!" .)