have a say in

1

Also, have a voice in. Have the right or power to influence or make a decision about something. For example, I want to have a say in this matter, or Citizens want to have a voice in their local government. [c. 1600]

2

have one's say. Express one's views, as in As soon as I've had my say I'll sit down. [Late 1600s]

3

have the say. Be in command, as in The general has the say over which troops will be sent. [Early 1800s]

Words nearby have a say in

have a mind to, have a nerve, have a nice day, have a penchant for, have a right to, have a say in, have a screw loose, have a shot at, have a stake in, have a thing about, have a thing going