Big around end of November and what follows it (5)

I believe the answer is:

oscar

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'big around end of november and what follows it' is the definition.
I know that 'november' relates to this answer.

'big around end of november' is the wordplay.
'big' becomes 'os'.
'around' becomes 'ca' (circa).
'end of' suggests the final letters.
The last letter of 'november' is 'r'.
'os'+'ca'+'r'='OSCAR'

Can you help me to learn more?

(Other definitions for oscar that I've seen before include "Film industry award" , "Statuette awarded by Hollywood Academy" , "Award by the Academy of Motion Picture Arts and Sciences" , "-- Wilde, author" , "Film prize" .)

I've seen this clue in The Guardian.

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