Rather large vehicle award (5)

I believe the answer is:

oscar

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'award' is the definition.
(an Academy Award)

'rather large vehicle' is the wordplay.
'rather large' becomes 'os' (abbreviation for oversize. I am not sure about the 'rather' bit.).
'vehicle' becomes 'car' (car is a kind of vehicle).
'os'+'car'='OSCAR'

Can you help me to learn more?

(Other definitions for oscar that I've seen before include "Film statuette" , "-- Wilde, author" , "One close to Mike" , "Film award; --- Hammerstein" , "One of several given to Chicago" .)

I've seen this clue in The Guardian.

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