Draconian (5)
'draconian' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stern that I've seen before include "Rear end" , "Unyielding part of the ship" , "Severe and unremitting: area of a ship" , "Severe, demanding" , "Grave; rear" .)
(Other definitions for sever that I've seen before include "Cut apart, maybe a relationship" , "Cut into parts" , "Cleave" , "Cut or break off, perhaps a relationship" , "Disconnect" .)
'draconian' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for harsh that I've seen before include "Strident" , "Unkind or cruel" , "Unpleasantly rough" , "Severe - unkind" , "Severe and disagreeable" .)