Possible Clues:

• New Rochelle, NY, college
• Burial place of Macbeth
• Island captured by nationalists
• College in New York
• For retirement, a top island
• Inner Hebridean island
• One claims to have the island in one's possession
• Small island in the Inner Hebrides near Mull
• I possess an island, by the sound of it
• Setting of St. Columba's missionary work