Crossword Genius

Frat friend (3)

Ross

I believe the answer is:

bro

(Other definitions for bro that I've seen before include "Word used for male relative" , "Sis's sibling?" , "US form of address" , "who may have a 28 [SIS]?" , "American greeting" .)

I've seen this clue in the Jonesin', The Wall Street Journal and the Jonesin Crosswords.
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