Little hopper (4)
I believe the answer is:
'little hopper' 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 "Amphibian with warts" , "Ancestral hall on River Bank" , "Wind in Willows hall-owner" , "Wind in Willows motorist" , "Froglike animal or repulsive person" .)