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