Bar opposite (7)
I believe the answer is:
counter
This clue is a double definition.
'bar' is the first definition.
(I've seen this before)
'opposite' is the second definition.
(thesaurus)
(Other definitions for counter that I've seen before include "Chip" , "Sales desk" , "Conversely" , "Trounce (anag.)" , "Oppose; bar; disc" .)