Tribe going around Brazilian city with old trumpet (7)

I believe the answer is:

clarion

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'old trumpet' is the definition.
'clarion' can be an answer for 'trumpet' (I've seen this before). I am not sure about the 'old' bit.

'tribe going around brazilian city' is the wordplay.
'tribe' becomes 'clan' (synonyms).
'going around' is an insertion indicator.
'brazilian city' becomes 'Rio' (Rio de Janeiro).
'clan' enclosing 'rio' is 'CLARION'.

'with' acts as a link.

Can you help me to learn more?

(Other definitions for clarion that I've seen before include "Trumpet (now more likely a newspaper)" , "Musical instrument" , "Loud, clear (call); old trumpet" , "Medieval brass instrument heard in carol" , "Loud and clear; shrill war trumpet" .)

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

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