Messenger, envoy (6)
I believe the answer is:
herald
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">messenger</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that herald is a type of messenger)</span><br/ ><br/ >'<span class="explanation-format__original">envoy</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for herald that I've seen before include "Ceremonial messenger" , "Presage for old announcer" , "Harbinger, precursor" , "Person who announces important news" , "Signal the arrival of" .)