Waterlogged (6)
I believe the answer is:
marshy
'waterlogged' is the definition.
(I know that waterlogged can be written as marshy)
This is the entire clue.
(Other definitions for marshy that I've seen before include "Damp and low-lying" , "(Of soil) soft and wet" , "Not solidly grounded" , "Boggy; waterlogged" , "Like fenlands" .)