Car's frame (7)
I believe the answer is:
chassis
(Other definitions for chassis that I've seen before include "basic structure" , "Bodywork" , "Mounting" , "Support" , "Vehicle's structural frame" .)
I believe the answer is:
chassis
(Other definitions for chassis that I've seen before include "basic structure" , "Bodywork" , "Mounting" , "Support" , "Vehicle's structural frame" .)