Element of glitz in car (4)
I believe the answer is:
zinc
'element' is the definition.
(zinc is a kind of element)
'of glitz in car' is the wordplay.
'of' indicates a hidden word.
'ZINC' can be found hidden inside 'glitz in car'.
(Other definitions for zinc that I've seen before include "it might be galvanising" , "White metallic element, symbol Zn" , "Galvanizing metal" , "Bluish-white lustrous metallic element" , "Metal used for galvanising steel" .)