clamp down on


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clamp down on something

to act to stop or limit something Police here have finally clamped down on speeding.
See also: clamp, down, on

clamp down on

Also, put the clamps on. Become stricter or more repressive; put a stop to. For example, The company was clamping down on expenses like business lunches, or It's time we put the clamps on polluters. [Mid-1900s]
See also: clamp, down, on