Genius celeb finally remedies green area (6,5)

I believe the answer is:

bright spark

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'genius' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'celeb finally remedies green area' is the wordplay.
'finally' suggests the final letters.
'remedies' becomes 'rights' (I can't explain this - if you can you should believe this answer much more).
'green area' becomes 'park' (a park is a green space).
The last letter of 'celeb' is 'b'.
'b'+'rights'+'park'='BRIGHT SPARK'

Can you help me to learn more?

(Other definitions for bright spark that I've seen before include "One full of ideas" , "Clever person" , "Lively and clever individual" , "one who has many good ideas" , "Someone who appears (irritatingly?) clever" .)

I've seen this clue in The Times.

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