Fusillade — volley (5)
I believe the answer is:
salvo
I believe this is a double definition.
'fusillade' is the first definition.
(I know that fusillade can be written as salvo)
'volley' is the second definition.
(I know that volley can be written as salvo)
(Other definitions for salvo that I've seen before include "Succession of shots" , "concentrated fire" , "Sudden round of applause" , "Discharge of gunfire" , "What comes across" .)