to allow someone else to control something you controlled previously, especially an organization or a country.

Company chiefs are often reluctant to hand over the reins of power to younger people.

I built up the business, but I handed over the reins to my daughter last year. (often + to)

• the thinking woman's crumpet
• the third degree
• the three R's
• the tide turns
• the time is ripe
• the tip of the iceberg
• the toast of
• the toast of somewhere
• the tools of the trade
• the tools of trade
• the tools of your trade
• the top brass
• the top dog
• the top flight
• the top of the heap
• the top of the hour
• the top of the ladder
• make ready to do something
• make rounds
• make scarce
• make seem like a picnic
• make sense
• make sense of
• make sense of something
• make sheep's eyes at