Parking arranged at a price for each person (3,6)
I believe the answer is:
per capita
'for each person' is the definition.
(synonyms)
'parking arranged at a price' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'arranged' indicates anagramming the letters (letters rearranged).
'at'+'a'+'price'='ataprice'
'ataprice' anagrammed gives 'ercapita'.
'p'+'ercapita'='PER CAPITA'
(Other definitions for per capita that I've seen before include "For each person - in routine Latin phrase" , "apiece" , "A head" .)