Argentina-based musical (5)
I believe the answer is:
evita
'argentina-based musical' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for evita that I've seen before include "Juan Peron's wife" , "Famous musical" , "1978 Lloyd Webber musical" , "Eva Peron" , "Musical based on Argentine leader" .)