Herald's tunic (6)
I believe the answer is:
tabard
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">herald's tunic</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 tabard that I've seen before include "Sleeveless jerkin" , "Knight's outer tunic" , "Inn where pilgrims met" , "Jacket worn by a herald" , "Herald's coat or tunic" .)