Always carried around in a car, hence the roll of flab (5,4)
I believe the answer is:
spare tyre
'roll of flab' is the definition.
The definition suggests a singular noun which matches the answer.
'always carried around in a car hence' is the wordplay.
I cannot quite understand how this works, but
'around' could be 're' (regarding) and 're' is found within the answer.
'a' is within the answer.
'car' could be 't' and 't' is present in the answer.
The remaining letters 'spyre' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'the' is the link.
Can you help me to learn more?
(Other definitions for spare tyre that I've seen before include "stomach?" , "large corporation" , "rubber one gaining traction?" , "Roll of fat around the waist, like car part" , "what motorist carries" .)