Bright vehicle carrying the Parisian (5)
I believe the answer is:
clear
'bright' is the definition.
(thesaurus)
'vehicle carrying the parisian' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle**).
'carrying' means one lot of letters goes inside another.
'the parisian' becomes 'le' (definite article in French).
'car' enclosing 'le' is 'CLEAR'.
(Other definitions for clear that I've seen before include "Fine" , "Get net" , "Fair - innocent" , "Lucid, transparent" , "Unobstructed" .)