Phoned to stop musical pair finding Mexican city (7)

I believe the answer is:

durango

'mexican city' is the definition.
(I've seen this before)

'phoned to stop musical pair' is the wordplay.
'phoned' becomes 'rang' ('ring' can be a synonym of 'phone').
'to stop' is an insertion indicator (inserted letters plug or stop a gap).
'musical pair' becomes 'duo' (I've seen this in another clue).
'rang' placed inside 'duo' is 'DURANGO'.

'finding' is the link.

(Another definition for durango that I've seen is " Mexican city".)

I've seen this clue in The Times.

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