Sale about to be arranged with article missing? It's fixed! (8)

I believe the answer is:

absolute

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'fixed' is the definition.
(thesaurus)

I can't explain the rest of the clue.

(Other definitions for absolute that I've seen before include "Sheer, utter or not limited" , "Complete or not limited" , "Free from limits, power perhaps" , "Despotic" , "Complete or unconditional" .)

I've seen this clue in The Telegraph.

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