Cheap adhesive (5)
I believe the answer is:
tacky
This clue is a double definition.
'cheap' is the first definition.
(I know that cheap can be written as tacky)
'adhesive' is the second definition.
(thesaurus)
(Other definitions for tacky that I've seen before include "Unpleasant" , "Cheap and nasty" , "Gimcrack" , "Shoddy - slightly sticky" , "lacking in taste" .)