Excellent solving! (8)

I believe the answer is:

cracking

I believe this clue is a double definition.

'excellent' is the first definition.
(cracking can mean excellent or brilliant)

'solving' is the second definition.
(e.g. cracking a code)

(Other definitions for cracking that I've seen before include "Wonderful" , "great!" , "very fast" , "failing" , "Excellent; fracturing" .)

I've seen this clue in The Times and The Telegraph.

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