Is against (5)
'is against' is the definition.
('oppose' can be a synonym of 'be against')
This is all the clue.
(Other definitions for opposes that I've seen before include "Stands against" , "Goes against" , "Counters" , "Strongly disapproves" , "Disagrees with and attempts to prevent" .)
'is against' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for abuts that I've seen before include "borders" , "Ends or leans against" , "Of building, is next to" , "Touches, leans on" , "Lies adjacent to another" .)