Inexperienced arrival (6)
I believe the answer is:
newbie
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">inexperienced arrival</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for newbie that I've seen before include "Novice" , "Beginner" , "Greenhorn" , "Inexperienced arrival" , "Fresh Internet participant" .)