Like that half broken finger Paul has! (7)

I believe the answer is:

painful

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

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for painful that I've seen before include "Causing hurt, physical or mental" , "Causing trouble or difficulty - it hurts" , "Inflamed" , "Aching, hurtful" , "Distressing or hurtful" .)

I've seen this clue in the Evening Standard.

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