My T has a whole set of winding down cues. She reaches for her glasses and her appointment book and kind of shifts in her seat. I then know I have just a few minutes. Even so, I have found it abrupt at times and have asked for help winding down so now she often says something like "we're going to have to stop soon but before we do, I wanted to see how you're feeling/what your thoughts are about X/how this session has been for you." I have found that helpful. It's like then there's a minute to say goodbye and I don't feel kicked out in the middle of some awful feeling.

I have found that having longer sessions is helpful in other ways I really like to have T's help winding down whatever the length of the session. Longer sessions do help with the feeling of not being interrupted just when I was starting to get somewhere.