Turn part of car (5)
I believe the answer is:
wheel
'turn' is the definition.
(I've seen this before)
'part of car' is the wordplay.
I cannot really see how this works, but
'part' could be 'heel' (heel is a kind of part) and 'heel' is located in the answer.
A single letter 'w' 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 wheel that I've seen before include "Turn on axis" , "Castor" , "revolutionary device" , "Ferris -; Catherine -" , "Gyrate" .)