Loud noise from the back seat (6)
I believe the answer is:
rumble
This clue could be a double definition.
'loud noise' is the first definition.
(thesaurus)
'the back seat' is the second definition.
'rumble' can be an answer for 'seat' (rumble seat is a kind of seat). I'm unsure of the 'the back' bit.
'from' is the link.
Can you help me to learn more?
(Other definitions for rumble that I've seen before include "Make a continuous resonant sound" , "gang fight in New York City?" , "Discover the truth about" , "Discover (illicit activity); continuous deep noise" , "Low continuous noise" .)