Just support for the bar (7)
I believe the answer is:
upright
This clue is a double definition.
'just' is the first definition.
(both can mean fair or honest)
'support for the bar' is the second definition.
(type of structural support)
(Other definitions for upright that I've seen before include "Standing vertically - post" , "Good" , "Vertical post in rugby goal - strictly honourable" , "support" , "with principle" .)