Floating leaf of a lily (3)
I believe the answer is:
pad
'floating leaf of a lily' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pad that I've seen before include "Living quarters, colloquially" , "It's found on an animals's foot and a cricketer's leg" , "Walk with soft steady steps" , "Person's home; jotter" , "Sole" .)