Words are not about to stick (8)
I believe the answer is:
argument
'words' is the definition.
(thesaurus)
'are not about to stick' is the wordplay.
'not' becomes 'nt' (synonyms).
'about' indicates putting letters inside.
'to stick' becomes 'gum' (gum can mean to glue or stick).
'are'+'nt'='arent'
'arent' going around 'gum' is 'ARGUMENT'.
(Other definitions for argument that I've seen before include "Contentious debate" , "Clash of opinions" , "Line of reasoning" , "Opposed points of view" , "Heated debate" .)