What does the cryptic crossword clue "Surpass alfresco party (5)" mean?

The definition is "party". The wordplay uses a charade (building blocks). OUT (synonym of "alfresco") + DO (synonym of "party"); definition: "Surpass" The answer is OUTDO.

Surpass alfresco party (5)

Guardian #25676 | 9 Across | 2012-06-30 flower

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