Feudal peon (4)
I believe the answer is:
serf
'feudal peon' 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 "(In the Middle Ages) someone bound to the land" , "Tied estate worker" , "Thrall" , "Feudal labourer" , "Medieval person bound to a feudal lord" .)