Crossword Genius

Black’s Tal? Ignore opening and just castle! (8)

Ross

I believe the answer is:

balmoral

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

'castle' is the definition.
(I've seen this before)

'black's tal? ignore opening and just' is the wordplay.
I cannot quite understand how this works, but
'just' could be 'moral' (synonyms) and 'moral' is located in the answer.
'black' could be 'b' (as in pencil classifications) and 'b' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for balmoral that I've seen before include "Scottish residence of the British sovereign" , "Bonnet" , "Queen's castle" , "Royal castle in Scotland" , "Scottish castle and royal residence" .)

I've seen this clue in The Sunday Times.
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