Immoral behaviour (4)

I think it could be either:

evil

vice

'immoral behaviour' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for vice that I've seen before include "Getting a grip" , "Gripper - sin" , "Prefix for deputy to, say, chairman" , "In place of - depravity" , "Bad habits" .)

I've seen this clue in The Guardian and 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.