"Buenos Aires" musical (5)
I believe the answer is:
evita
'buenos aires musical' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for evita that I've seen before include "Peron musical" , "Musical based on Argentine leader" , "Famous musical" , "1978 Lloyd Webber musical" , "1996 musical film, starring Madonna" .)