Just erected, one side (7)
I believe the answer is:
upright
'just' is the definition.
(both can mean fair or honest)
'erected one side' is the wordplay.
'erected' becomes 'up'.
'one side' becomes 'right' (I've seen this before).
'up'+'right'='UPRIGHT'
(Other definitions for upright that I've seen before include "In an erect position" , "In a vertical position" , "Standing straight up" , "deserving respect" , "beyond reproach" .)