Standard score is capital (5)

I believe the answer is:

paris

'capital' is the definition.
(capital of France)

'standard score is' is the wordplay.
'standard score' becomes 'par' (I've seen this before).
'par'+'is'='PARIS'

(Other definitions for paris that I've seen before include "foreign city" , "Abductor of Helen" , "'''I love ... in the springtime'' (Cole Porter) (5)'" , "European capital - Greek hero" , "French capital - Trojan prince" .)

I've seen this clue in The Mirror.

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