Crossword Genius

The Sixers or Eagles, on scoreboards (3)

Ross

I believe the answer is:

phi

(Other definitions for phi that I've seen before include "Greek letter; hip (anag.)" , "Greek character" , "Twenty-first letter of the Greek alphabet" , "Twenty First Greek letter, pronounced as f" , "exotic character" .)

I've seen this clue in the USA Today.
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