Spoken at last in Balmoral (4)

I believe the answer is:

oral

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

'spoken' is the definition.
(similar in meaning)

'last in balmoral' is the wordplay.
'ORAL' is hidden within the letters.
But, I'm not sure how this is indicated.

'at' acts as a link.

Can you help me to learn more?

(Other definitions for oral that I've seen before include "Kind of examination" , "Ant; tourist (dial.)" , "By word of mouth (4)" , "Spoken test" , "Kind of exam" .)

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

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