Pa barking meekest sprays? (7,6)

I believe the answer is:

speaker system

'pa' is the definition.
(I've seen this in another clue)

'barking meekest sprays?' is the wordplay.
'barking' indicates anagramming the letters ('barking' can informally mean mad).
'meekest'+'sprays'='meekestsprays'
'meekestsprays' anagrammed gives 'SPEAKER SYSTEM'.

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

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