to try harder to prevent an illegal activity and deal more severely with those who are caught doing it :
Police are cracking down on drug dealers.
—related noun crackdown
to try harder to prevent an illegal activity and deal more severely with those who are caught doing it :
Police are cracking down on drug dealers.
—related noun crackdown
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005