Volte-face occasioned by spell of dizziness linked to drinks ordered from the bar

'the bar' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'volte-face occasioned by spell of dizziness linked to drinks ordered' is the wordplay.
I cannot really see how this works, but
'spell' could be 'turn' ('turn' can be a synonym of 'spell') and 'turn' is present in the answer.
'of' could be 'o' and 'o' is located in the answer.
The remaining letters 'rund' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).

'from' acts as a link.

Can you help me to learn more?