Annoying clunk/rattle in steering

Have someone turn the steering wheel back and forth with a little force while you watch and listen underneath the front end and you'll find it.
Ball joints at the hubs can seem tight, but they are under a load when sitting so it's hard to tell.
At the shop we used to use a big screwdriver or small prybar between the control arm and hub to chk for movement in the ball joints.