Boggy, marshy (6)
I believe the answer is:
swampy
I believe this clue is a double definition.
'boggy' is the first definition.
(I know that boggy can be written as swampy)
'marshy' is the second definition.
(I know that marshy can be written as swampy)
(Other definitions for swampy that I've seen before include "uncultivated and wet" , "Boggy -waterlogged" , "Boggy, marshy" , "Marshlike" , "gets bogged down?" .)