Note, missive (7)
I believe the answer is:
message
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">note</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(a note is a short message)</span><br/ ><br/ >'<span class="explanation-format__original">missive</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for message that I've seen before include "Tidings" , "Communication that is sent" , "meaning" , "Spoken or written communication" , "Missive" .)