Scottish form of sabre (5)

I believe the answer is:

braes

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'scottish form of sabre' is the definition.
I can't tell whether this definition defines the answer.

'form of sabre' is the wordplay.
'form of' is an anagram indicator (the letters need to be in another 'form').
'sabre' anagrammed gives 'BRAES'.

Can you help me to learn more?

(Other definitions for braes that I've seen before include "Hillsides in Scotland" , "Old song 'By yon bonny banks, and by yon bonny . . . . .'" , "Scottish hillsides, banks" , "Sabre (anag) - Scottish banks" .)

I've seen this clue in the Evening Standard.

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