
1) City near Rio 2) Grassy south american plains 3) Impact crater on Mars 4) Portuguese surname 5) South American grasslands 6) South american plains
Found on
https://www.crosswordclues.com/clue/campos

(from the article `Amazon River`) ...drainage system. The Branco watershed, approximately coincident with the state of Roraima, includes extensive tracts of sandy, leached soils that ... The principal region of grassland in South America is in the southeast portion of the continent; it can be divided into the Pampas of Argentina and ......
Found on
http://www.britannica.com/eb/a-z/c/13

The campus police who patrol Rice University; refers to either one policeman, a group of them, and/or the collective entity of policemen [clipping/blend of 'campus' and 'police.'] i.e. 'You could get a ticket from the campos if you park your car here.' (Conversation)
Found on
http://www.encyclo.co.uk/local/20035

The campos are the open grassy plains of South America.
Found on
http://www.probertencyclopaedia.com/browse/AC.HTM
No exact match found.