Late bar vibrant in province (7)

I believe the answer is:

alberta

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

'province' is the definition.
(province of Canada)

'late bar vibrant' is the wordplay.
'late bar' can be anagrammed to 'ALBERTA'.
Though, I am unsure how this is indicated.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for alberta that I've seen before include "Bale rat out of Canada" , "Ratable (anag)" , "part of Canada" , "Province of W. Canada" , "Banff province" .)

I've seen this clue in The Sun.

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