Girl over here about to quickly mix drink (5,7)
I believe the answer is:
irish whiskey
'drink' is the definition.
(Irish whiskey is an example)
'girl over here about to quickly mix' is the wordplay.
'girl' becomes 'Iris' (girl's name).
'over here' becomes 'hey' (both might be said to get someone's attention).
'about' means one lot of letters goes inside another.
'to quickly mix' becomes 'whisk' (as in whisking an egg).
'hey' placed around 'whisk' is 'hwhiskey'.
'iris'+'hwhiskey'='IRISH WHISKEY'
(Other definitions for irish whiskey that I've seen before include "Form of distilled alcohol" , "Type of spirit" .)