Change ten pounds getting something for the car (3)
I believe the answer is:
oil
'change' is the definition.
(oil change is a kind of change)
'ten pounds getting something for the car' is the wordplay.
I cannot quite understand how this works, but
'pounds' could be 'l' (L can represent the monetary pound) and 'l' is found within the answer.
The remaining letters 'oi' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for oil that I've seen before include "Slippery liquid" , "Liquid lubricant" , "Fluid lubricant" , "Thick liquid that doesn't dissolve in water" , "Lubricant or petroleum" .)