Gummy (6)
I believe the answer is:
sticky
'gummy' is the definition.
(I know that gummy can be written as sticky)
This is all the clue.
(Other definitions for sticky that I've seen before include "Damp with sweat" , "Adhesive; awkward" , "Gluey, gooey" , "Close" , "Adhesive - muggy" .)