Benefit from saying about vehicle temperature (9)
I believe the answer is:
advantage
'benefit' is the definition.
(I've seen this before)
'saying about vehicle temperature' is the wordplay.
'saying' becomes 'adage' (adage is a kind of saying).
'about' is an insertion indicator.
'vehicle temperature' becomes 'vant' (I can't explain this - if you can you should give a lot more credence to this answer).
'adage' going around 'vant' is 'ADVANTAGE'.
'from' is the link.
Can you help me to learn more?
(Other definitions for advantage that I've seen before include "Edge, head start" , "Upper hand, benefit" , "First point scored after deuce in tennis" , "Use" , "Favourable circumstance" .)