Drink onboard and dance in competitive game in sarcastic fashion (10)

'drink onboard' is the definition.
I know nothing about this answer so I can't tell whether this works.

'dance in competitive game in sarcastic fashion' is the wordplay.
I cannot quite understand how this works, but
'dance' could be 'ball' (ball is a kind of dance) and 'ball' is located in the answer.
'game' could be 'p' (I have seen 'French game ' mean 'p' so perhaps 'game' could also mean 'p') and 'p' is found in the answer.
'fashion' could be 'sort' (I've seen this before) and 'sort' is present in the leftover letters.
A single letter 's' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'and' acts as a link.

Can you help me to learn more?