Not a tough business proposition? (6)

I believe the answer is:

tender

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'proposition?' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

(Other definitions for tender that I've seen before include "Bill from Avon's beloved" , "Make offer in gentle way" , "Painful to the touch" , "A gentle kind of bid" , "Gentle and sore" .)

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

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