Crossword Genius

Short film and book with page appearing about Balkan city (7)

Ross

I believe the answer is:

plovdiv

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

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for plovdiv that I've seen before include "Balkan city" , "Bulgarian city" .)

I've seen this clue in The Times.
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