Tailless amphibian (4)
I believe the answer is:
frog
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tailless amphibian</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for frog that I've seen before include "Leaping amphibian" , "throat problem" , "Long-legged amphibian" , "Amphibious neighbour of 12?" , "Grown-up tadpole" .)