Fine the Parisian parked in vehicle (5)
I believe the answer is:
clear
'fine' is the definition.
(as in clear weather)
'the parisian parked in vehicle' is the wordplay.
'the parisian' becomes 'le' (definite article in French).
'parked in' means one lot of letters goes inside another.
'vehicle' becomes 'car' (car is a kind of vehicle).
'le' inserted inside 'car' is 'CLEAR'.
(Other definitions for clear that I've seen before include "Exculpate" , "Easy to see or understand" , "Comprehensible" , "Understandable" , "Get net" .)