Possible Clues:

• Óscar's 'other'
• 40-Across, in Acapulco
• Other, in Sevilla
• Oaxacan 'other'
• Mexican 'other'
• Por ___ lado (conversely: Sp.)
• Another, in Acapulco
• Juan's ''an extra''
• Ortega's ''other''
• 'Al ___ Lado del Río' (2004 Oscar-winning song)