Cricket side at Oval smoothly added to score (6)

I believe the answer is:

legato

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'smoothly added to score' is the definition.
I can't judge whether this defines the answer.

'cricket side at oval' is the wordplay.
'cricket side' becomes 'leg' (I've seen this before).
'oval' becomes 'O'.
'leg'+'at'+'o'='LEGATO'

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(Other definitions for legato that I've seen before include "Smoothly (mus.)" , "running into each other" , "Smoothly (musical)" , "In music, in a smooth even manner" , "Musically smooth" .)

I've seen this clue in The Guardian.

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