Shoe with holes (4)
I believe the answer is:
croc
'shoe with holes' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for croc that I've seen before include "that might be sitting on your foot" , "creature heard to be a vicious one" , "Small reptile" , "Fierce reptile" , "Large, bony-plated reptile (abbr)" .)