Ceremonial firing of guns (6)
I believe the answer is:
salute
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ceremonial firing of guns</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for salute that I've seen before include "Bring hand smartly to cap" , "Hail, greet" , "Acknowledge (superior)" , "Greet with a sign" , "Hail respectfully" .)