Comic beyond valuation (9)

I believe the answer is:

priceless

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'comic' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?

I don't understand the remainder of the clue.

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(Other definitions for priceless that I've seen before include "Of incalculable value" , "of inestimable worth" , "Wonderful" , "Beyond value" , "Very precious; highly amusing" .)

I've seen this clue in The Times.

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