Possible Clues:

• El ___ (legendary city of gold)
• El . . . . . ., imaginary place of great wealth
• "El ___" (John Wayne film)
• El ___
• El -- (city of treasure)
• "El ___"(Wayne film)
• 'El ..., imaginary place of great wealth (6)'
• Food fish also called mahi mahi
• Marine fish
• El __ (legendary city)