Lily pad squatter (4)
I believe the answer is:
frog
'lily pad squatter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for frog that I've seen before include "Grown-up tadpole" , "Croaking amphibian" , "fastener" , "Adult tadpole" , "eg Kermit" .)