Oppressed girl lives in city near Sidon with duke (10)

I believe the answer is:

tyrannised

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

I cannot understand how the remainder of the clue works.

(Other definitions for tyrannised that I've seen before include "Oppressed" , "Cruelly treated" .)

I've seen this clue in The Times.

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