A sodden area or mass, perhaps (6)
I believe the answer is:
morass
'a sodden area' is the definition.
'morass' can be an answer for 'area' (I have seen 'Boggy area ' mean 'morass' so perhaps 'area' could also mean 'morass'). I am unsure of the 'a sodden' bit.
'or mass perhaps' is the wordplay.
'perhaps' indicates an anagram.
'or'+'mass'='ormass'
'ormass' is an anagram of 'MORASS'.
Can you help me to learn more?
(Other definitions for morass that I've seen before include "Slough - marsh" , "Mire, quagmire" , "Tract of soft, wet ground" , "mess" , "Confusion" .)