Parking freedom is commonplace (9)
I believe the answer is:
platitude
'commonplace' is the definition.
(I know that commonplace can be written as platitude)
'parking freedom' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'freedom' becomes 'latitude' (latitude is a kind of freedom).
'p'+'latitude'='PLATITUDE'
'is' acts as a link.
(Other definitions for platitude that I've seen before include "Trite saying" , "Trite or obvious remark" , "overused phrase" , "Trite statement" , "Licence" .)