Set upon one's fiancee (8)

I believe the answer is:

intended

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'fiancee' is the definition.
(intended can mean someone's fiancee)

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

(Other definitions for intended that I've seen before include "Deliberate" , "wanted from the outset" , "Fiance (e) - on purpose" , "Meant - fiancee" , "Had in mind to" .)

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

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