Crossword Genius

Shoe with ventilation holes (4)

Ross

I believe the answer is:

croc

(Other definitions for croc that I've seen before include "Large predatory reptile (colloq.)" , "Predatory reptile (abbr)" , "Pot tailless" , "Snapper" , "Long-tailed reptile (abbr)" .)

I've seen this clue in the USA Today.
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