Wetland entry on website ignoring Lake (3)
I believe the answer is:
bog
'wetland' is the definition.
'entry on website ignoring lake' is the wordplay.
'entry on website' becomes 'blog'.
'ignoring' indicates named letters should be taken away.
'lake' becomes 'l'.
'blog' with 'l' removed is 'BOG'.
(Other definitions for bog that I've seen before include "Swamp" , "Peaty area" , "Soft wet land" , "Peaty wetland" , "convenience" .)