Feudal toiler (4)
I believe the answer is:
serf
'feudal toiler' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for serf that I've seen before include "Servant, vassal" , "labourer with no property of his own" , "Old worker" , "'In the Middle Ages, a person owned by a feudal lord (4)'" , "Feudal subject" .)