What you might hear about car ring.. (5)
I believe the answer is:
audio
'what you might hear' is the definition.
I can't judge whether this defines the answer.
'car ring' is the wordplay.
'car' becomes 'audi' (Audi is a German car brand).
'ring' becomes 'O' (letter resembling a ring).
'audi'+'o'='AUDIO'
'about' acts as a link.
Can you help me to learn more?
(Other definitions for audio that I've seen before include "Relating to sound or hearing" , "TV sound" , "- - visual aids" , "type of reproduction" , "Recording of acoustic signals" .)