Hearing car in Parisian church (8)
I believe the answer is:
audience
'hearing' is the definition.
(I know that hearing can be written as audience)
'car in parisian church' is the wordplay.
'car' becomes 'audi' (Audi is a German car brand).
'in parisian' becomes 'en' ('in' in French).
'church' becomes 'CE' (abbreviation for Church of England).
'audi'+'en'+'ce'='AUDIENCE'
(Other definitions for audience that I've seen before include "that might come into play?" , "People attending theatre" , "They've come to see a play" , "Formal or ceremonial interview" , "Group of spectators or listeners" .)