Possible Clues:

• Shantytown in Brazil
• Shanty town in best-loved American city
• Brazilian slum
• Rio de Janeiro shanty town, say
• Term used to describe poorer neighbourhoods in Brazil
• Poor area by Rio? Preferred North American city
• The poorest area at bottom of road with unfinished place
• Poorest area of best-loved city
• Shanty town, especially in Brazil
• Rio slum