Medieval laborer (4)
I believe the answer is:
serf
'medieval laborer' is the definition.
(I've seen this in another clue)
This is all the clue.
(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" .)