Discipline, punish (7)
I believe the answer is:
chasten
I believe this clue is a double definition.
'discipline' is the first definition.
(I've seen this before)
'punish' is the second definition.
(chasten could historically mean to punish)
(Other definitions for chasten that I've seen before include "Castigate or punish" , "Subdue, correct by punishing" , "Subdue pride of with a stench" , "Censure severely" , "Subdue - a stench (anag)" .)