Mail recipient (9)
I believe the answer is:
addressee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mail recipient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for addressee that I've seen before include "Recipient of mail" , "One contacted" , "Intended recipient of letter" , "The person to whom letter is delivered" , "He's written to" .)