Salvo (6)
I believe the answer is:
volley
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">salvo</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that salvo can be written as volley)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for volley that I've seen before include "Lovely kind of tennis stroke" , "Cannonade" , "Shot played before the ball bounces" , "Simultaneous discharge of a number of firearms" , "Tennis, football, shot" .)