Harry and Fred in Rio? (9)

I believe the answer is:

ferdinand

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

'rio?' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

'harry and fred in' is the wordplay.
'harry' is an anagram indicator (harry can mean to attack or spoil).
'and'+'fred'+'in'='andfredin'
'andfredin' anagrammed gives 'FERDINAND'.

Can you help me to learn more?

(Other definitions for ferdinand that I've seen before include "Spanish king" , "29 9 [TEMPEST CHARACTER]" , "He loved Miranda (Tempest)" , "emperor" .)

I've seen this clue in The Independent.

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