Dias Cortes could be excluded from the group (10)

I believe the answer is:

ostracised

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'excluded from the group' is the definition.
I can't tell whether this definition defines the answer.

'dias cortes could be' is the wordplay.
'could be' indicates an anagram.
'dias'+'cortes'='diascortes'
'diascortes' anagrammed gives 'OSTRACISED'.

Can you help me to learn more?

(Other definitions for ostracised that I've seen before include "Sent to Coventry" , "out in the cold" , "shunned" , "banished?" , "excluded from society" .)

I've seen this clue in the Sydney Morning Herald.

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