Incompetent? Interesting (7)

I believe the answer is:

notable

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This clue might be a double definition.

'incompetent?' is the first definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?

'interesting' is the second definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?

Can you help me to learn more?

(Other definitions for notable that I've seen before include "Celebrated" , "Big noise" , "Unusual" , "Prominent" , "Great" .)

I've seen this clue in The Daily Express.

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