Good service from Steffi (4)

I believe the answer is:

graf

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'steffi' is the definition.
I can't tell whether this definition defines the answer.

'good service' is the wordplay.
'good' becomes 'g' (abbreviation).
'service' becomes 'raf'.
'g'+'raf'='GRAF'

'from' acts as a link.

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(Other definitions for graf that I've seen before include "German count - German tennis player" , "Steffi --, tennis champion" , "German tennis player, b. 1969" , "Seven-times women's Wimbledon champion, b. 1969" , "Steffi --, tennis player" .)

I've seen this clue in the Evening Standard.

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