clamp down on
US /klæmp daʊn ɑːn/
UK /klæmp daʊn ɑːn/

1.
menindak tegas, memperketat
to become more strict about something, or to try to stop something bad from happening
:
•
The police are clamping down on illegal parking.
Polisi menindak tegas parkir ilegal.
•
The government plans to clamp down on tax evasion.
Pemerintah berencana untuk menindak tegas penghindaran pajak.