Crossword Genius

From a hundred, point fifty are outstandingly good (5)

Ross

I believe the answer is:

excel

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'are outstandingly good' is the definition.
I can't tell whether this definition defines the answer.

'from a hundred point fifty' is the wordplay.
'from' becomes 'ex' ('from' in Latin).
'a hundred' becomes 'C' (Roman numeral).
'point' becomes 'E' (compass point).
'fifty' becomes 'l' (Roman numeral).
'ex'+'c'+'e'+'l'='EXCEL'

Can you help me to learn more?

(Other definitions for excel that I've seen before include "Surpass; shine" , "Show brilliance" , "Be exceptionally good (at a subject)" , "Be superior to" , "Be very good at, better than others" .)

I've seen this clue in the Evening Standard.
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