Connections seems to be purposely tricky.
They often have one or two categories where 5 of the words could potentially fit.
You have to find the one that has multiple meanings and could fit in another category.
Also, if you don't know a reference, it's totally trial and error.
For example, today I knew humble, match, tinder were all dating apps. I figured grinder could be either a dating app (although it's spelled grindr) or a sandwich. However, I never heard of hinge, so that had to be a guess.
Also, I knew Lost Boys and Twilight, but never heard of Blade or Near Dark.
The purple category can often be maddeningly abstruse.