I tie around your waist and cover the front of your clothes. I help keep your clothes clean while you cook. What am I?

Bippity boppity boop, this magical tool was not made for you. It chooses the witch or wizard, we don't choose it, hope you get it right, to prevent a big fright.

Almost an instrument, though I can't carry a tune But I may carry fun, monkeys, or rum for you

Around the waist, snug it sits tight, holding up trousers with all its might. A trusty band, both sleek and strong, keeping things up as you stroll along.

I top your pizza and your martini, In salads and dips you’ll find me. From my pit comes liquid shine, Tiny, round, and so divine. Who could I be?