Conservative, directly opposed (6)
I believe the answer is:
square
I believe this clue is a double definition.
'conservative' is the first definition.
(I've seen this before)
'directly opposed' is the second definition.
(square can mean directly next to)
(Other definitions for square that I've seen before include "Old fogey" , "New York Times, for example" , "Londoners associate with Leicester" , "Fair" , "Regular shape - fuddy-duddy" .)