Clear just helps you get to the front of the TSA Precheck line and its airport dependent and time of day whether it’s any faster than regular TSA Precheck + DigitalID.
But we are talking about $85 for five years for PreCheck.
But as far as security, the only difference pre check makes is that you don’t have to take your belt and shoes off.
I mentioned earlier that newer scanners don’t require you to take electronics out of your bag whether or not you have PreCheck