Punish one following teacher round at home (10)
I believe the answer is:
discipline
'punish' is the definition.
(disciplining is a kind of punishing)
'one following teacher round at home' is the wordplay.
'one following teacher' becomes 'disciple' (a disciple follows another's teachings).
'round' indicates putting letters inside.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'disciple' enclosing 'in' is 'DISCIPLINE'.
(Other definitions for discipline that I've seen before include "Branch of knowledge; punish" , "Field" , "Correction" , "Punishment" , "Training designed to engender self-control" .)