MacNamara gone to some autonomous Spanish region? (6)

I believe the answer is:

aragon

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'spanish region?' is the definition.
(region of Spain)

'macnamara gone to some' is the wordplay.
'to some' indicates the answer is hidden within the clue.
'ARAGON' is hidden in the letters of 'macnamara gone'.

'autonomous' acts as a link.
This may not be right. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for aragon that I've seen before include "(7 of) Henry's first" , "Former Spanish kingdom" , "French poet" , "part of Spain" , "Whence Catherine" .)

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

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