Crossword Genius

Salute charity worker (5)

Ross

I believe the answer is:

salvo

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

This clue might be a double definition.

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

'charity worker' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

Can you help me to learn more?

(Other definitions for salvo that I've seen before include "Burst (of applause, insults, artillery etc)" , "Simultaneous burst of gunfire" , "Simultaneous discharge of weapons" , "Artillery salute" , "Discharge of gunfire" .)

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