Word after legal or lily (3)
I believe the answer is:
pad
'word after legal or lily' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pad that I've seen before include "Floating leaf of water-lily" , "Fill with extra material in order to lengthen" , "Tread softly" , "pack" , "eg Bedsitter" .)