
1) Arid South American plain 2) Extensive SA plain 3) New Mexico canyon 4) Shoe brand 5) Some reach a country plain 6) South American region
Found on
https://www.crosswordclues.com/clue/chaco

provincia (province), northeastern Argentina, between the northwestern Argentine highlands and the Paraná River and bounded on part of the east by ...
Found on
http://www.britannica.com/eb/a-z/c/49

Province of northeast Argentina; area 99,633 sq km/38,469 sq mi; population (2001 est) 979,000; its capital is Resistencia, in the southeast. The province forms part of the Gran Chaco area of South America, which extends into Bolivia and Paraguay, and consists of a flat savannah lowland, mainly covered with scrub, and has many lakes...
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https://www.encyclo.co.uk/local/21221

a part of the Gran Chaco region in central South America, in Bolivia, Paraguay, and Argentina. ab. 100,000 sq. mi. (259,000 sq. km). · See
Found on
https://www.infoplease.com/dictionary/chaco
No exact match found.