If you struggle with a slice and you want to cure it, most people typically start with the path. Slicers, more often than not, swing from the outside-in with an open clubface. This results in a shot that takes off relatively straight — your path and open clubface simulate a relatively straight delivery for the first few moments after impact — and then spin well off line.
Instead of working to fix your path, begin by taking measures to square your clubface. Once you’re able to square the clubface and even close it down through impact, your brain can process that the more in-to-out path is required to avoid the big pull. This is the proper sequence. You can’t fix the plane until you fix the face first.