Frog's cousin (4)
I believe the answer is:
toad
'frog's cousin' 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 "species of amphibian" , "driver of reckless repute" , "Wind in Willows hall-owner" , "Hateful person; animal" , "Froglike animal or repulsive person" .)