Adult polliwog (4)
I believe the answer is:
toad
'adult polliwog' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for toad that I've seen before include "A loathsome person" , "Wind in Willows hall-owner" , "Stout-bodied amphibian" , "Tailless amphibian" , "Hateful person; animal" .)