Glutinous, sticky (6)
I believe the answer is:
viscid
I believe this is a double definition.
'glutinous' is the first definition.
(I know that glutinous can be written as viscid)
'sticky' is the second definition.
(I know that sticky can be written as viscid)
(Other definitions for viscid that I've seen before include "Cohesive and sticky" , "Of a consistency like treacle" , "Of liquid, thick and gluey" , "Glutinous, sticky" , "Sticky, gluey" .)