Car part worn round the waist? (5,4)
I believe the answer is:
spare tyre
'car part' is the definition.
'spare tyre' can be an answer for 'part' (I have seen 'Part of corporation' mean 'spare tyre' so perhaps 'part' could also mean 'spare tyre'). I am unsure of the 'car' bit.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for spare tyre that I've seen before include "Extra bit of fat" , "evidence of overindulgence" , "Fat around the midriff?" , "sign of over-indulgence?" , "Form of extra weight" .)