Itinerant seller (6)
I believe the answer is:
pedlar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">itinerant seller</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 pedlar that I've seen before include "dealer?" , "Itinerant salesman" , "Itinerant vendor" , "Travelling seller" , "Mobile salesman" .)