Belgian city under feudal tenure (5)

I believe the answer is:

liege

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

I can't explain the rest of the clue.

(Other definitions for liege that I've seen before include "Faithful," , "European province" , "Belgian, French-speaking city" , "On about one East Belgium city" , "Chieftain" .)

I've seen this clue in The Times.

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