Swampy, waterlogged (6)
I believe the answer is:
marshy
This clue is a double definition.
'swampy' is the first definition.
(I know that swampy can be written as marshy)
'waterlogged' is the second definition.
(I know that waterlogged can be written as marshy)
(Other definitions for marshy that I've seen before include "Like swamps" , "Like fenlands" , "treacherous underfoot" , "(Of ground) wet" , "Boggy; waterlogged" .)