Unpleasantly wet (4)
I believe the answer is:
dank
'unpleasantly wet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dank that I've seen before include "Unpleasantly wet and cold" , "(Of atmosphere) wet and unpleasant" , "Unpleasantly cool and damp" , "Unpleasantly cool and humid" , "Unpleasantly moist" .)