Bucketful of perverse fun, thus for the masochist? (7)

I believe the answer is:

painful

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for painful that I've seen before include "Tender" , "Embarrassing" , "Hurting" , "Causing physical discomfort" , "Causing trouble or difficulty - it hurts" .)

I've seen this clue in The Times.

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.