Replanning vacation O.S. to part of Canada (4,6)

I believe the answer is:

nova scotia

I'm a little stuck... Click here to teach me more about this clue!

'to part of canada' is the definition.
('Nova Scotia' is part of 'canada')

'replanning vacation o s' is the wordplay.
'vacation o s' anagrams to 'NOVA SCOTIA'.
Though, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for nova scotia that I've seen before include "Atlantic region" , "Canadian province" , "Canadian peninsula" .)

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

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