Crossword Genius

Female pig (3)

Ross

I think it could be either:

goo

sow

(Other definitions for goo that I've seen before include "Sticky stuff or sickly sentiment" , "Sentimentality (sl.)" , "syrup" , "Substance that's viscous" , "Slime" .)

I've seen this clue in the Universal, the Penny Press, the Evening Standard, The Star Tribune, The New York Times, The Times, the LA Times, The Telegraph, the King Feature Syndicate, the Newsday, The Independent and The Mirror.
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