Crossword Genius

Large vehicles sought by film stars (6)

Ross

I believe the answer is:

oscars

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'sought by film stars' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.

'large vehicles' is the wordplay.
'large' becomes 'os' (abbreviation for oversize).
'vehicles' becomes 'cars' (car is a kind of vehicle).
'os'+'cars'='OSCARS'

Can you help me to learn more?

(Other definitions for oscars that I've seen before include "American Academy Awards" , "Awards, for dramatic achievements" , "Cinema's Academy Awards" , "Hollywood annual film awards" , "American film Awards" .)

I've seen this clue in The Irish Independent.
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