NEGRO

Set to 5 different clues across 9 published puzzles, most often “Part of U.N.C.F.” — The New York Times, Wednesday, 10 December 2008.

5 letters

Every clue on record, most used first

Part of U.N.C.F.3 times
The New York Times — Wednesday, 10 December 2008
The "N" of U.N.C.F.3 times
The New York Times — Thursday, 20 June 2002
Rio ___, Amazon feederonce
The New York Times — Friday, 29 April 2005
South America's Rio ___once
The New York Times — Sunday, 9 May 2004
Rio ___, part of the Venezuela/ Colombia boundaryonce
The New York Times — Sunday, 29 February 2004