Item won't delete from Safari history on my Mac
I know how to delete items from my history but there's some nasty pernicious ad I've obviously clicked on accidentally and no matter how many times I press delete or clear history it won't go away. Even when i go to 'show all history' it's still there. And when I select it and click on delete it stays there. how can i get rid of it please?
MacBook Pro 13", macOS 10.14