clamp_down
1. [ verb ] (politics) become more restrictive or repressive; impose strict controls on
Examples:

"They are clamping down on under-age drinking now"

Related terms: repress
2. [ verb ] (law) get serious about enforcing a rule
Synonyms: get_tough crack_down
Examples:

"We have to clamp down and get tough on the dissidents"

Related terms: restrict enforce crackdown
3. [ verb ] repress or suppress (something regarded as undesirable)
Synonyms: crack_down
Examples:

"The police clamped down on illegal drugs"

Related terms: restrict
Similar spelling:   clampdown
  climb_down
  climb-down
  climb_on