Whiskey for French royalty (7)
I believe the answer is:
bourbon
This clue is a double definition.
'whiskey' is the first definition.
(bourbon is a kind of whiskey)
'french royalty' is the second definition.
(French royal house)
'for' acts as a link.
(Other definitions for bourbon that I've seen before include "A drink" , "Whiskey - biscuit" , "Corn whiskey" , "American whiskey - French royal house" , "Maize whiskey" .)