Crossword Genius

Absurd result of devaluation (9)

Ross

I believe the answer is:

priceless

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

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for priceless that I've seen before include "unaffordable?" , "of inestimable worth" , "Killing" , "Of inestimable value" , "Beyond value" .)

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