Master and servant (5)

I believe the answer is:

liege

This clue is a double definition.

'master' is the first definition.
(thesaurus)

'servant' is the second definition.
(thesaurus)

'and' is the link.

(Other definitions for liege that I've seen before include "Belgian, French-speaking city" , "Belgian city or feudal superior" , "Vassal; city in Belgium" , "World War one battle site" , "Owing feudal allegiance" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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