Warty amphibian (4)
I believe the answer is:
toad
'warty amphibian' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for toad that I've seen before include "not found in Ireland" , "Common amphibian" , "Dangerous driver" , "Tailless amphibian" , "Stout-bodied amphibian" .)