Invented art form without meaning to (11)

I believe the answer is:

inadvertent

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'without meaning to' is the definition.
I can't judge whether this definition defines the answer.

'invented art form' is the wordplay.
'form' indicates anagramming the letters (another form of the letters).
'invented'+'art'='inventedart'
'inventedart' anagrammed gives 'INADVERTENT'.

Can you help me to learn more?

(Other definitions for inadvertent that I've seen before include "Accidental" , "Unintentional" , "Unthinking" , "unguarded" , "without meaning" .)

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

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