You can see in the screenshot below a spotlight suggestion that I don't understand why it shows up, it looks like a Safari icon (as a web search result suggestion), but it actually is a bit different. I don't understand where it came from, what kind of suggestion it is (file, web search, email?) and most importantly how do I get rid of it?
I know this has to do with Spotlight's "Siri Suggestions", as if I turn that off, it will go away. However, I do want Siri suggestions, I just want to get rid of this music band.
Open in Finder
option is available, you may be able to find it & delete it... maybe in your web browser(s) history file?