Former Irishman from overseas? (5)

I believe the answer is:

expat

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'overseas?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'former irishman' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'irishman' becomes 'Pat' (Patrick is a common Irish name).
'ex'+'pat'='EXPAT'

'from' is the link.

Can you help me to learn more?

(Other definitions for expat that I've seen before include "Person living abroad" , "One living abroad (abbrev.)" , "one working abroad" , "resident abroad" , "One living in foreign country" .)

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

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