Long Cleeve was a town in the Shire.
Other versions of the legendarium
Long Cleeve appears in the A Part of the Shire map drawn by Christopher Tolkien in 1943, along with many other names, that didn't make it to the published version of the map.
Long Cleeve was the home of the North-tooks, a distant branch of the Took Family who were descended from Bandobras the Bullroarer. It was the home of Diamond, who married Peregrin Took eight years after his return from the War of the Ring.