The city of South Africa referred to in the crossword solution is Johannesburg, which is the largest city in South Africa and the provincial capital of Gauteng. It is located in the northeastern part of the country and is the economic hub of South Africa. Johannesburg is known for its gold mining industry, which began in 1886, and is now a major center for finance and business. The city is also home to many cultural attractions, including the Apartheid Museum, Constitution Hill, and the Johannesburg Zoo.