Open-air party is best (5)

I believe the answer is:

outdo

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'is best' is the definition.
(I've seen this before)

'open-air party' is the wordplay.
'open' becomes 'out' (I've seen this in other clues).
'air party' becomes 'do' (do can informally mean a party. I am not sure about the 'air' bit.).
'out'+'do'='OUTDO'

Can you help me to learn more?

(Other definitions for outdo that I've seen before include "Perform better than another" , "Exceed" , "Defeat" , "Surpass - overshadow - excel" , "Cap" .)

I've seen this clue in The Globe and Mail.

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