Crossword Genius

SE Asian politics transformed the provinces (15)

Ross

I believe the answer is:

specialisations

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'provinces' is the definition.
Although both the answer and definition are plural nouns, I can't see how they can define each other.

'se asian politics transformed' is the wordplay.
'transformed' indicates anagramming the letters.
'se'+'asian'+'politics'='seasianpolitics'
'seasianpolitics' with letters rearranged gives 'SPECIALISATIONS'.

'the' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.
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