More about capital (4)
I believe the answer is:
rome
'capital' is the definition.
(capital of Italy)
'more about' is the wordplay.
'about' indicates an anagram.
'more' anagrammed gives 'ROME'.
(Other definitions for rome that I've seen before include "City not built in a day" , "Basis for cheese" , "Where to emulate the locals" , "When there, do as the native do" , "Seat of Italian empire" .)