Clearing old Google results boils down to one question: do you control the...

https://reportz.io/technology/how-do-i-keep-dead-urls-from-creating-a-bad-user-experience-in-search/

Clearing old Google results boils down to one question: do you control the site? If you own it, update the page to a 410 error or fix the content, then use the "Refresh Outdated Content" tool