Wet earth (3)
I believe the answer is:
mud
'wet earth' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for mud that I've seen before include "Soft sticky earth" , "Alluvial deposit as in river bed" , "in your eye, it's an affable toast" , "In your eye, this is an informal toast" , "Clay" .)