Sponging, leechlike (9)
I believe the answer is:
parasitic
I believe this is a double definition.
'sponging' is the first definition.
(I've seen this in another clue)
'leechlike' is the second definition.
(I know that leechlike can be written as parasitic)
(Other definitions for parasitic that I've seen before include "Like mistletoe" , "Bloodsucking" , "hanging on?" , "Such threats" , "Living on another like flea" .)