Yankee flourished, putting away whiskey provided (7)
I believe the answer is:
yielded
'provided' is the definition.
(yielding is a kind of providing)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for yielded that I've seen before include "Produced, provided" , "Submitted" , "given away" , "resigned" , "Generated (financial return)" .)