Finished arranging our genes? Too kind (12)

I believe the answer is:

overgenerous

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

'finished arranging our genes?' is the wordplay.
'finished' becomes 'over' (over can mean finished or ended).
'arranging' indicates an anagram.
'our'+'genes'='ourgenes'
'ourgenes' anagrammed gives 'generous'.
'over'+'generous'='OVERGENEROUS'

Can you help me to learn more?

(Other definitions for overgenerous that I've seen before include "too liberal?" , "Too bountiful" , "extremely charitable" , "Giving too much away" .)

I've seen this clue in The Daily Express.

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