Medieval laborer (4)
I believe the answer is:
serf
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">medieval laborer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for serf that I've seen before include "Peasant, agricultural labourer" , "Person required to work for a lord" , "Feudal estate worker" , "Person bound to the land and owned by a feudal lord" , "Feudal peasant" .)