Old model car, much corroded but considered reliable (7)
I believe the answer is:
trusted
'reliable' is the definition.
(I've seen this in another clue)
'old model car much corroded but considered' is the wordplay.
I cannot really see how this works, but
'model' could be 't' (Ford Model T car) and 't' is found in the answer.
'car' could be 't' and 't' is found within the answer.
'old' could be 'used' (as in used or second-hand items) and 'used' is found within the leftover letters.
A single letter 'r' remains 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 trusted that I've seen before include "Have confidence or faith in" , "Relied upon" , "Believed in" , "Put faith in" , "Banked on" .)