Try and restore evacuated part of car (4)
I believe the answer is:
tyre
'part of car' is the definition.
(I know that tyre is part of motor car)
'try and restore evacuated' is the wordplay.
'try' becomes 'ty' (I can't justify this - if you can you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'evacuated' says to hollow out the word (remove centre letters) (internal letters are evacuated from the word).
'restore' with its centre removed is 're'.
'ty'+'re'='TYRE'
Can you help me to learn more?
(Other definitions for tyre that I've seen before include "Wheel cover, may be tubeless" , "Seaport once famed for its purple dye" , "Travelling band" , "A spare one round the middle is fat" , "Rubber cushion round car wheel" .)