clamp down phrasal verb ( see also ↑ clamp )
to take firm action to stop a particular type of crime ⇨ clampdown
clamp down on
The police are clamping down on drink-driving offenders.
clamp down phrasal verb ( see also ↑ clamp )
to take firm action to stop a particular type of crime ⇨ clampdown
clamp down on
The police are clamping down on drink-driving offenders.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012