Patsy forced to fast? Finishes off Limoncello, Cointreau, cognac and Scotch (1,4,5)

I believe the answer is:

a soft touch

'patsy' is the definition.
(both can mean someone taken advantage of)

I don't understand the rest of the clue.

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.