Crossword Genius

Snappy reptile (abbr) (4)

Ross

I believe the answer is:

croc

(Other definitions for croc that I've seen before include "Reptile (abbrev.)" , "that might be sitting on your foot" , "Predatory reptile (abbr)" , "Short reptile" , "Long-tailed reptile (abbr)" .)

I've seen this clue in The Guardian.
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