Crossword Genius

Best spreadsheet? (5)

Ross

I believe the answer is:

excel

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'best' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for excel that I've seen before include "Surpass; shine" , "Do superbly well" , "Perform extremely well" , "Do really well as at exams" , "Be outstanding" .)

I've seen this clue in The Hindu.
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