Military instrument (5)
I believe the answer is:
bugle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">military instrument</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 bugle that I've seen before include "Horn" , "A military trumpet" , "ornament for dress" , "Bit of brass" , "Does it call" .)