Okay. I guess I'm left to provide the dissenting opinion.
I tried a clicker a couple of years back due to inconsistent anchor (rather than target panic). What I found was that the clicker caused me target panic.
My shooting completely fell apart while using one. I took it off and started focusing on my anchor. Don't get me wrong, I'm a believer that consistent form is the key to accuracy. But, I also believe that consistency is achieved in different ways for different people.
A clicker caused target panic for me, but, it appears, I am the exception.