Chief bartender missing opener to serve good French whiskey (7)
I believe the answer is:
bourbon
'whiskey' is the definition.
(bourbon is a kind of whiskey)
'chief bartender missing opener to serve good french' is the wordplay.
I cannot quite understand how this works, but
'good french' could be 'bon' ('good' in French) and 'bon' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bourbon that I've seen before include "Biscuit -- alcohol" , "10" , "American whisky; biscuit" , "Maize whiskey" , "Corn whiskey" .)