Antagonise using a story in canteen regularly (8)
I believe the answer is:
alienate
'antagonise' is the definition.
(thesaurus)
'a story in canteen regularly' is the wordplay.
'story' becomes 'lie' (I've seen this before).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'in'+'canteen'='incanteen'
The alternate letters of 'incanteen' are 'nate'.
'a'+'lie'+'nate'='ALIENATE'
'using' is the link.
(Other definitions for alienate that I've seen before include "Set against" , "Cause a friend to become hostile" , "divorce" , "Make hostile, cause to become unfriendly" , "Cause (someone) to feel isolated" .)