Many thanks for replying. The very first thing I did was set it in the SEO module to not include it in search results. Didn't try the meta tag thinking that would be redundant setting that in the SEO module. Just added the meta tag and SEMrush still says "80 internal links are broken", all from that one page being in the main menu.
The only way SEMrush will avoid crawling it is adding it to robots.txt. Guess I'm SOL.
Since we can't edit robots.txt, do you think SS Support would consider adding it?