The crossword solution for the term 'Mull Neighbor' is Iona, which is a small island located off the west coast of Scotland. It is the largest island in the Inner Hebrides and is known for its stunning landscapes and rich history. Iona is home to a number of ancient monuments, including the ruins of an abbey founded by St. Columba in 563 AD. The island is also known for its traditional Gaelic culture and is a popular tourist destination.