Make more concrete outside court? Right (7)
I believe the answer is:
rectify
'right' is the definition.
(I know that right can be written as rectify)
'make more concrete outside court?' is the wordplay.
'make more concrete' becomes 'reify' (I've seen this before).
'outside' indicates putting letters inside (some letters go outside others).
'court?' becomes 'ct' (abbreviation used in road names).
'reify' enclosing 'ct' is 'RECTIFY'.
(Other definitions for rectify that I've seen before include "Correct - repair" , "change current form" , "Make correct, put right" .)