to take strict action in order to prevent sth, especially crime :
a campaign by police to clamp down on street crime
—related noun clampdown
to take strict action in order to prevent sth, especially crime :
a campaign by police to clamp down on street crime
—related noun clampdown
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005