Morass (3)
'morass' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bog that I've seen before include "Peaty area" , "Soft wet land" , "Peaty wetland" , "Fen" , "Mire" .)
'morass' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for marsh that I've seen before include "Swampland" , "Wetland" , "eg Romney" , "Fen" , "Bog, swamp" .)