Crossword Genius

Pro's opponent (3)

Ross

I believe the answer is:

con

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pro's opponent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for con that I've seen before include "Swindle; steer" , "Learn; swindle" , "Swindle or trick someone" , "Have a reason not to" , "politician who's in the right" .)

I've seen this clue in the Penny Press and The New York Times.
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