Indecorous finding due - I will look bad (11)

I believe the answer is:

undignified

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'will look bad' is the definition.
(something undignified looks bad or embarrassing)

'indecorous finding due i' is the wordplay.
'finding due i' anagrams to 'UNDIGNIFIED'.
However, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for undignified that I've seen before include "Not becoming" , "Unseemly, looking foolish" .)

I've seen this clue in The Independent.

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