After opening, reviewed indigenous musical (5)

I believe the answer is:

evita

I'm a little stuck... Click here to teach me more about this clue!

'musical' is the definition.
(Andrew Lloyd Webber musical)

I cannot understand how the rest of the clue works.

(Other definitions for evita that I've seen before include "Stage musical" , "1978 Lloyd Webber musical" , "Nineteen Dn musical" , "Famous musical" , "Juan Peron's wife" .)

I've seen this clue in the Sydney Morning Herald.

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