Aggressive outburst in nasal voice (5)

I believe the answer is:

salvo

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

'aggressive outburst' is the definition.
'salvo' can be an answer for 'outburst' (I've seen this before). I am not sure about the 'aggressive' bit.

'in nasal voice' is the wordplay.
'in' indicates the answer is hidden within the clue.
'SALVO' is hidden within 'nasal voice'.

Can you help me to learn more?

(Other definitions for salvo that I've seen before include "Fiery outburst" , "Rapid simultaneous discharge of firearms" , "Simultaneous discharge of guns" , "Simultaneous burst of gunfire" , "Barrage" .)

I've seen this clue in The Times.

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