Possible Clues:

• Romantic and expensive island in Bay of Naples
• Tropical corn from the island
• An island in mid-Atlantic, a primates' paradise
• One might have this sort of corn for an island goat
• 70's-80's Mercury
• I'll sound as if one might have a go at this with corn
• See, at the beginning of April the corn there would be 9 down
• Though it's not in the tropics, one might get tropical corn there
• Romantic Isle in Bay of Naples
• Bay of Naples attraction