Crossword Genius

Name an outsize auto (5)

Ross

I believe the answer is:

oscar

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'name an' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'outsize auto' is the wordplay.
'outsize' becomes 'os'.
'auto' becomes 'car' (synonyms).
'os'+'car'='OSCAR'

Can you help me to learn more?

(Other definitions for oscar that I've seen before include "Code word for O" , "letter read out on radio" , "Film award; --- Hammerstein" , "US film award" , "Film statuette" .)

I've seen this clue in the Evening Standard.
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