Wet weather gear thrown into a car (8)
I believe the answer is:
raincoat
'wet weather gear' is the definition.
(I've seen this before)
'thrown into a car' is the wordplay.
'thrown' indicates anagramming the letters.
'into'+'a'+'car'='intoacar'
'intoacar' anagrammed gives 'RAINCOAT'.
(Other definitions for raincoat that I've seen before include "Catriona (anag.)" , "Waterproof outer garment" , "Mackintosh" , "Wet weather gear" , "clothing" .)