German who sang with pop star for Capital (7)
I believe the answer is:
nicosia
'for capital' is the definition.
(capital of Cyprus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for nicosia that I've seen before include "Mediterranean city" , "Casino I used in Cyprus" , "Largest city on Cyprus" , "Casino I visit in Cyprus" , "Divided city of Cyprus" .)