Completely different; facing (8)
I believe the answer is:
opposite
This clue is a double definition.
'completely different' is the first definition.
'facing' is the second definition.
(as in two things facing each other)
(Other definitions for opposite that I've seen before include "Contrary or face-to-face" , "Adverse" , "completely different?" , "Contrary, antipode" , "Corresponding" .)