Capital I put into refurbished casino (7)
I believe the answer is:
nicosia
'capital' is the definition.
(Nicosia is an example)
'i put into refurbished casino' is the wordplay.
'put into' means one lot of letters goes inside another.
'refurbished' indicates anagramming the letters.
'casino' with letters rearranged gives 'ncosia'.
'i' inserted inside 'ncosia' is 'NICOSIA'.
(Other definitions for nicosia that I've seen before include "It's capital in Cyprus (7)" , "Largest city on Cyprus" , "Divided Cypriot capital" , "capital city" , "Mediterranean capital" .)