Troop meantime demolished Eastern power (7,6)

I believe the answer is:

ottoman empire

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'eastern power' is the definition.
The definition suggests a singular noun which matches the answer.

'troop meantime demolished' is the wordplay.
'demolished' indicates anagramming the letters.
'troop'+'meantime'='troopmeantime'
'troopmeantime' with letters rearranged gives 'OTTOMAN EMPIRE'.

Can you help me to learn more?

(Other definitions for ottoman empire that I've seen before include "superpower now gone" , "Turkish dominion" , "Former Turkish sultanate" .)

I've seen this clue in The Independent.

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