Answer: gating

AnswerCrossword Clue
GATINGLock tumbler opening.
GATINGPunishment by confinement to school grounds: Eng.
GATINGConfinement within school bounds: England.
GATINGRestriction to quarters at Oxford.
GATINGConfining to campus: Brit.
GATINGDetention at British boarding schools
gatingthe process by which a channel in a cell membrane opens or closes
gatingthe act of providing a gate