Unpleasantly damp and sticky (6)
I believe the answer is:
clammy
'unpleasantly damp and sticky' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for clammy that I've seen before include "Stewing" , "Unpleasantly damp and sticky" , "Unpleasantly cool and humid" , "Unpleasantly sticky and moist" , "Cold and damp" .)